Arduino Forum

Using Arduino => Installation & Troubleshooting => Topic started by: HBRancher on Oct 07, 2015, 04:26 pm

Title: El Capitan - Arduino IDE serial port problems
Post by: HBRancher on Oct 07, 2015, 04:26 pm
El Capitan upgrade has broken the Arduino IDE serial comm to Arduino Mega 2560 boards.
The boards are clone Mega 2560, I have three different boards
SunFounder Universal Starter Kit for Arduino (With MEGA 2560)
XCSOURCE ATmega2560-16AU ATMEGA16U2 Board
Ieik Mega2560 R3 ATmega2560-16AU + ATMEGA16U2
All worked well under Yosemite, stopped working after El Capitan OSX update.
After running Arduino IDE the port is seen as /dev/cu.usbmodem1A21, open serial monitor, no communication with boards... Type one char in serial monitor... Mac bluetooth devices lockup (keyboard, trackpad) no comm with boards.... have to reboot....
Probably have to reinstall Yosemite, but would like to see if anyone has a solution for El Capitan first....
Any help is very appreciated...
Thanks

HBRancher
 
Posts: 3
Joined: Wed Oct 07, 2015 5:19 am
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: el_capitan on Oct 10, 2015, 01:03 pm
Same problem here but with an Arduino UNO r3.
With Windows 10 no problem, with el capitan arduino isn't in ports from IDE
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: Novale on Oct 10, 2015, 06:44 pm
I have the same issue USB driver not working on El Capitan
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: wizardofwords on Oct 11, 2015, 04:48 pm
I have the very same problem with El Capitan and my genuine Arduino UNO.

There are no "tty" ports listed in Arduino IDE, just "cu".

An helping hand would be really appreciated!

Thanks to everybody.
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: johnwasser on Oct 12, 2015, 02:16 pm
There are no "tty" ports listed in Arduino IDE, just "cu".
The "/dev/cu." port seems to work the same as the corresponding "/dev/tty." port.  The 1.6.x IDE just stopped showing both.  Use the "/dev/cu." port.
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: el_capitan on Oct 12, 2015, 06:39 pm
how to Use the "/dev/cu." port ???
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: Alligator on Oct 13, 2015, 04:25 am
The Arduino IDE does not work with an Adafruit Gemma either.  It will not recognize the USB connection as a serial port at all in OS 10.11.  Help!
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: emcgowen on Oct 13, 2015, 08:13 pm
I've found that I am able to program an Arduino / Genuino UNO R 3 through Bluetooth in El Capitan, using a Bluefruit EZ-Link (https://www.adafruit.com/products/1588?gclid=CjwKEAjw1_KwBRDEz_WvncL4jGwSJAAEym0djyWp9xK9E9s1JZ56zF5kdb8tkENFPL-IIvQTsfVh3xoCL_Hw_wcB). The Arduino IDE does see the Bluetooth link once you have paired it from your computer. That isn't a great workaround for the general problem because it requires adding Bluetooth to every project.

It seems that every USB serial port device is broken in El Capitan. I have a Pololu Zumo 32U4 robot based on a ATmega32U4 which uses LUFA USB (http://www.fourwalledcubicle.com/LUFA.php) and its port is now invisible too.
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: thelonederanger on Oct 15, 2015, 11:27 am
I have the very same problem with El Capitan and my genuine Arduino UNO.

There are no "tty" ports listed in Arduino IDE, just "cu".
Bit of a noob, but here is what I have found...

I have just installed the new release of Arduino IDE 1.6.6 (nightly???) on El Capitan 10.11.

Since upgrading to El Capitan I noticed my cheap Chinese nano's are no longer connectable via USB :( They have the CH340G USB chip which used to work with this driver...
http://kiguino.moos.io/2014/12/31/how-to-use-arduino-nano-mini-pro-with-CH340G-on-mac-osx-yosemite.html


I can get the Uno and Uno compatible boards running under "dev/cu.csbmodem1411" which appeared as expected. LeoStick (Freetonics Leonardo Compatible arduino) works exactly as expected. But DFRobot 4wd MiniQ which is also supposed to work as Leonardo Compatible will not show up.

Sorry it isn't much help except to let you know what I found as working under the new OSX. Looking forward to the geniuses updating the drivers.

Good luck

Title: Re: El Capitan - Arduino IDE serial port problems
Post by: cidiemme on Oct 16, 2015, 01:14 pm
Hello,
After the update to El Capitan, I can't see the serial port for my nano clones, CH340 equiped :-)
I tried this command:
sudo nvram boot-args="kext-dev-mode=1"
without success, doesn't work with El capitan released (but seems ok with Yosemite and  El capitan beta versions).


I found this solution (https://www.kiwi-electronics.eu/blog?journal_blog_post_id=7):

--------------------------------------
Just like Yosemite, El Capitan requires kext driver signing. How this can be disabled in OSX 10.11 is changed however.

To get the CH340 drivers to work in El Capitan you need to use the new tool csrutil as follows:

   Reboot and press CMD+R immediately after hearing the startup sound to boot to Recovery Mode
   Open Terminal
   Execute the following command: csrutil enable --without kext
   Reboot
--------------------------------------

Just another link with the same workaround:
http://tzapu.com/2015/09/24/making-ch340-ch341-serial-adapters-work-under-el-capitan-os-x/

Claudio
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: emn_mun on Oct 21, 2015, 11:04 am
@ cidiemme, just made an account to thank you. Was very close on giving up and do it in Windows.
The solution from (https://www.kiwi-electronics.eu/blog?journal_blog_post_id=7) worked for me in El Capitan.
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: cidiemme on Oct 21, 2015, 11:05 pm
@ cidiemme, just made an account to thank you.
Hello,
I'm really happy to read! :-)
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: paoloh1950 on Oct 22, 2015, 01:48 pm
Same problem of tty ports disappeared in El Capitan.
Any port showed isn't good.
I have an Arduino Uno Rev.3 board equipped with ATMEGA 16U2.
Arduino IDE is 1.6.5
I think that installing CH340 drivers is a nonsense in my case.
Thanks to everybody can help me.
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: thelonederanger on Oct 22, 2015, 01:55 pm
@ cidiemme,
I second that Thanks. Cheers.


@paoloh1950,
Same problem of tty ports disappeared in El Capitan.
Any port showed isn't good.
I have an Arduino Uno Rev.3 board equipped with ATMEGA 16U2.
Arduino IDE is 1.6.5
I think that installing CH340 drivers is a nonsense in my case.
Thanks to everybody can help me.
I have Uno Rev 3 working fine on the latest version of the IDE. I think I downloaded and installed it again and all was good after that.

Good Luck
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: paoloh1950 on Oct 22, 2015, 02:46 pm
I have installed le latest version of Arduino IDE, of oct-14th-2015, but the same problem of no tty port continues.
Not enough luck!
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: OldSteve on Oct 23, 2015, 02:43 am
I have installed le latest version of Arduino IDE, of oct-14th-2015, but the same problem of no tty port continues.
Not enough luck!
Then perhaps you should look more deeply into the possibility that your problem is unrelated, and caused by something else.
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: ardn00bo on Oct 23, 2015, 05:24 am
I have two boards with issues.

Using El Capitan + Arduino IDE 1.6.6 10/14/15 build

1. Chinese clone.
Following https://www.kiwi-electronics.eu/blog?journal_blog_post_id=7 solves the serial port driver load issue.

When uploading a sketch I get avrdude stk500v2_getsync() errors.

Is this due to a lack of a boot loader on the board?

I tried ISP with a redboard to the clone and this fails.

Followed the hookup in this link http://www.gammon.com.au/forum/?id=11635

Programmer: Arduino as ISP
Tools->Burn Bootloader

 
Result:

"avrdude: Yikes!  Invalid device signature.
         Double check connections and try again, or use -F to override
         this check."

Believe my connection are the same as in the link. I do not have a 10uF Cap between the reset and ground like some links indicate.

Can I update the boot loader with just a mac and the clone board?

2. Official Arduino Mega 2560 board
Not detected. What driver should this use? FTDI driver?

I have sparkfun Uno compatible board - I install the FTDI driver and it works, but the official Arduino Mega 2560 fails.

Any advice appreciated. Please let me know what info I can provide to help troubleshoot this.
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: OldSteve on Oct 23, 2015, 07:14 am
Followed the hookup in this link http://www.gammon.com.au/forum/?id=11635

Programmer: Arduino as ISP
Tools->Burn Bootloader
Result:
"avrdude: Yikes!  Invalid device signature.
         Double check connections and try again, or use -F to override
         this check."
Nick Gammon's instructions don't say to use >Burn Bootloader. You only followed his hookup, not all of his method.

I followed his instructions last week to burn new bootloaders onto 2 x ATMega328P chips, and used his sketch in an Arduino UNO to burn the bootloader onto new chips on a breadboard, not the Arduino IDE's >Burn Bootloader.
His sketch to burn a bootloader is "Atmega_Board_Programmer". Note that you need to download his whole directory, because it also contains the actual bootloader code in *.h files.

Quote
Believe my connection are the same as in the link. I do not have a 10uF Cap between the reset and ground like some links indicate.
I didn't need a cap either, but did you try one? You should be able to use your working UNO clone to do the burning, running Nick's sketch and the connections he provided.

Quote
Can I update the boot loader with just a mac and the clone board?
Yes, if you can load Nick's sketch onto the clone UNO, as I just said above. You can bypass the "Arduino as ISP" and "Burn Bootloader" in the IDE.

Quote
2. Official Arduino Mega 2560 board
Not detected. What driver should this use? FTDI driver?
No driver needed. After a little reading on the Mega, (I only have UNOs), I found this, relating to the (original) Arduino ATMega2560 R3:-
Quote
Because the board features Atmel's own USB-to-Serial chip instead of an FTDI chip, there is no need for drivers under Linux or Mac (only an .inf file included with the Arduino IDE is required for Windows), and you have the ability to make the board show up as various types of devices.
So if you're on Mac, and have a genuine R3 Mega, you shouldn't need additional drivers. (I guess that means you have other problems, since the El Capitan issue in this thread relates to the (insecure) CH340G drivers.)
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: Augury on Oct 23, 2015, 11:47 am
Same kind of problem here, in my Old MacPro :
- cannot upload in any board ( Arduino Uno and Arduino micro), in /dev/cu...
- when I try to use the Serial Monitor, bluetooth connections are done ( my keyboard and my magic mouse were disconnected) 
- in bash, just try a ' cat /dev/tty....', same BT crash

My old and dusty usb was OK


Something between Serial driver and ElCapitan BT ?
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: paoloh1950 on Oct 23, 2015, 04:23 pm
Some more information that could be useful for anyone would help me.
The command: ls /dev/tty.* in Terminal answers: /dev/tty.usbmodem5D11, but that port doesn't appear in the list of ports in Arduino IDE, where I can find only: /dev/cu.usbmodem5D11.
The Mac System Profiler in hardware USB shows Arduino connected to a USB port.
Could it be a problem of baud rate?
Thanks!
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: ardn00bo on Oct 26, 2015, 01:17 am
Hi OldSteve,

1. Chinese clone.
Thanks for the catch. I followed Nick Gammon's instructions, and can update at the 2560 boot loader from a redboard (uno) . I have another issue where a sketch can upload to the 2560 only once with a fresh boot loader.

See

[Topic: Upload Timeout Error on Mega 2560 - Not Sure What Changed] https://forum.arduino.cc/index.php?topic=83079.msg2450514

2. Official 2560
I removed the FTDI driver from Mac OS 10.11, anduse the stock driver. Uno serial is detected, but official 2560  board is not. I see some other posts in the forum on this, but no clues as to a fix or what to do to debug.

Thanks.
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: cmug on Nov 03, 2015, 05:25 pm
Read that Arduino IDE 1.6.6. is arrived. Anyone tried yet ?
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: cmug on Nov 04, 2015, 05:12 pm
Also no Luck here.
I have installed version update 1.6.6. Arduino IDE, but not change anything. Still wrong driver, and can't upload script. (El Capitan iMac 2008 with Arduino UNO and MEGA16U2 1440-PH
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: KittyJuls on Nov 04, 2015, 08:30 pm
I found this solution (https://www.kiwi-electronics.eu/blog?journal_blog_post_id=7):

--------------------------------------
Just like Yosemite, El Capitan requires kext driver signing. How this can be disabled in OSX 10.11 is changed however.

To get the CH340 drivers to work in El Capitan you need to use the new tool csrutil as follows:

   Reboot and press CMD+R immediately after hearing the startup sound to boot to Recovery Mode
   Open Terminal
   Execute the following command: csrutil enable --without kext
   Reboot


Claudio

Perfect, this worked for me. At first seemed nothing had changed but after unplugging and replugging nano clone /dev/cu.usbserial came back :)

Thanks!
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: el_capitan on Nov 06, 2015, 01:13 pm
Anyone managed to use Official Arduino UNO R3 (not listed in ports) on mac Os X 10.11 El capitan without disabling SIP ??
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: jorgert on Nov 12, 2015, 05:06 pm
For me the solution is: https://www.kiwi-electronics.eu/blog?journal_blog_post_id=7
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: Brucevos on Nov 16, 2015, 04:58 am
So I got this Arduino DCcEle DCcduino UNO from my Pop.  Trying to upload to it using USB cable to MacBook Pro, early 2011, running El Capitan.

No USB ports that are useful show up, just bluetooth and wireless.

Tried some of the stuff suggested, nothing works. Don't want to use a pc.

What's the best way to proceed to play with this thing?

I need to be able to upload some code to it.



solved it myself ->http://www.jasinski.us/cheap-arduino-clone-dccele-dccduino-un
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: CrossRoads on Nov 16, 2015, 05:05 am
Start with Loopback test, see if CH430x driver is working.
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: undercode on Nov 25, 2015, 12:43 pm
Hello.

I recently found this site https://codebender.cc (https://codebender.cc), and I downloaded the drivers that made my Nano work on Mac OS 10.11.1.

Dig up and give it a try. Use Chrome because Safari is not supported.

Cheers!
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: argenino on Dec 16, 2015, 07:42 am
everyone got their El Capitan working with Arduino?  why there's no update on the solution?  I got a ProtoSnap and can't get anything working...
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: Arthur500 on Dec 27, 2015, 08:20 am
There seems to be a new SIGNED driver from the official source dated 3-Nov-2015. 
See http://kiguino.moos.io/2014/12/31/how-to-use-arduino-nano-mini-pro-with-CH340G-on-mac-osx-yosemite.html

I tried it and it works on El Capitan!!!  Need to Option-Open the package to make it run.

Also found found I needed to select some other board then reselect Nano to get the correct port options (/dev/cu.whcusbserialNNN) to show up.
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: ArdLab_Gent on Jan 04, 2016, 08:39 pm
There seems to be a new SIGNED driver from the official source dated 3-Nov-2015.  
See http://kiguino.moos.io/2014/12/31/how-to-use-arduino-nano-mini-pro-with-CH340G-on-mac-osx-yosemite.html
Works fine with El Capitan (OS X 10.11 (15A284)), IDE 1.6.5 and NodeMCU 1.0 (CH340).
Cannot test with Arduino as I have no Arduino with CH340.

Thanks for the link
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: PhilippeFromGpe on Jan 08, 2016, 06:19 pm
I had problems until I inserted a usb hub between my iMac (el Capitan) and my original ardunino Uno and now it's working.

Each time I tried to upload a sketch, cpu goes to 100% and I was not able to open serial monitor

Now, with the usb hub, I can open the serial monitor, compile  and upload sketches without troubles.

On the Mac console windows , the only difference is I don't see anymore  the following message :
AppleUSBHostPort::resetGated: retrying enumeration in 100 ms

I hope this will help someone
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: Hal_cat on Jan 11, 2016, 09:52 pm
I have noticed lots of action on fixing problems with the Arduino IDE, but with the latest hourly build from Jan 11, 2016, I cannot download software to a real Arduino UNO rev 3 from the IDE on a Mac running El Capitan, and when I try I lose the Bluetooth connection to my keyboard and mouse.

While I realize that this was caused by changes made by Apple, I am disappointed that no fix has been made as yet.  The problem is now several months old.

I have a very poor work around, running the IDE under a VM, so I am not out of business.

If someone tells me how to get diagnostic info I would be happy to do that.
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: BruceinHawaii on Jan 13, 2016, 02:30 am
No luck with El Capitan for me either.  I am running Arduino IDE 1.6.7 and have a Zero board purchased from Arduino.cc.  Only port option showing up is "/dev/cu.bluetooth-incoming-port". 
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: fedemengo on Jan 14, 2016, 04:25 pm
I did.. You have to download this driver:

http://0xcf.com/2015/03/13/chinese-arduinos-with-ch340-ch341-serial-usb-chip-on-os-x-yosemite/

but you don't have to follow the instructions, these works with El Capitan, so:



Now everything should works, at least it works for me. :D  ;)
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: Tayac on Jan 23, 2016, 02:08 pm
Hi,

I've the same problem with a fresh install of El Capitan on a Mac Mini. So I've found a workaround which is not the best solution, but it works.

On my MacI've installed Virtualbox https://www.virtualbox.org and its virtual box extension pack. Then I've installed Windows 7 on the virtual machine, the Arduino software, set up the configuration, drivers, ...
It took a long time for the completion but now I could use again the Arduino on the Mac.

Cheers
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: stefanomasini on Jan 23, 2016, 09:19 pm
I had the same problem. I found a signed version of the driver that solved the problem for me:

http://blog.sengotta.net/signed-mac-os-driver-for-winchiphead-ch340-serial-bridge/
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: gradybooch on Feb 07, 2016, 07:09 am
No joy here. I have an out of the box official Arduino Uno R3, the latest version of the Arduino app (1.6.8 Hourly Build 2016/02/02 running on a Mac with the latest version of El Capitan), and I've selected the proper board (Arduino Uno) and serial port (in my case /dev/cu.usbmodem141111 (Arduino Uno/Genunio Uno
). I'd tried disabling SIP, but still nothing.

When uploading, I get the dreaded

    avrdude: stk500_recv(): programmer is not responding

I've been searching forums for almost two hours, and no one seems to have a solution.

Has anyone yet been successful?
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: kunklekid on Feb 07, 2016, 10:25 pm
I have been having that problem all day
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: FrktLille on Mar 12, 2016, 06:10 pm
 :)  :)

Great news ! I have found a solution that's work perfectly on Mac OS X El Capitan (10.11) !

As I my uploads worked fine on Arduino Pro Mini with my FTDI breakboard and suitable Apple Signed driver , I have tried to use it with Arduino Uno, but it didn't work ...
After long reads in forums and several try, I have finally found the solution that's work perfectly !

You have to use an FTDI breakboard (Sparkfun) in replacement of built-in Atmega USB chip.

Once you have an FTDI breakboard, download driver :
http://www.ftdichip.com/Drivers/VCP/MacOSX/FTDIUSBSerialDriver_v2_3.dmg (http://www.ftdichip.com/Drivers/VCP/MacOSX/FTDIUSBSerialDriver_v2_3.dmg)

Step 1: Install Driver
=>Once done, and break board connected to your Mac, you will show "FT232R USB UART" in detailled system information, under USB


Step 2 : Wiring (BB = Breakboard)
BB GND to Arduino GND
BB VCC to Arduino VCC
BB TX0 to Arduino RXD
BB RXI to Arduino TXD
and the last most special wiring => BB DTR to Arduino Reset with 100nF capacitor between DTR pin and Reset pin (In my case, it didn't work, but with an additional 100nF capacitor to reach 200nF, it works fine !!)

Step 3 : Arduino IDE
Select >Tools > Port: "/dev/cu.usbserialA700e5Q6

Step4 : Upload as usual ... and have fun
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: Vince100 on Mar 27, 2016, 05:34 pm
Thank you FrktLille !!

That work perfectly on mac.
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: RudiNiemeijer on Apr 06, 2016, 07:13 am
So, even though there are success stories, a solution for the new MKR1000 ('Maker One?') for use in OS X El Capitan seems not at hand. I've tried the solution to disable the 'check for signed drivers' to no avail. Tried removing drivers, downloaded the hourly build, but no success.

Anyone here who got an Genuino (or Arduino for that matter) MKR1000 working under OS X 10.11.3 El Capitan?

Do we know what drivers (what chip brand) the MKR1000 needs? Are these signed?
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: damienholloway on Apr 09, 2016, 07:13 pm
I had trouble with OSX 10.11 and MKR1000. I connected the MKR1000 to another Macbook running 10.9 and loaded the getting started sketch. Once I did that I was able to plug the device back into my 10.11 device running EL Capitan and the port appeared. I don't understand why.
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: FrktLille on Apr 13, 2016, 03:13 pm
About MKR1000,

In my opinion, you should be able use the given solution with ftdi breakout board on MKR1000 too, using the MKR1000 following pins :
GND : 11
5V : 14
TX : 9
RX : 8
Reset : 10

Actually, I think this solution can be used on all arduino boards ...
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: braines on Jun 01, 2016, 04:01 pm
I was fighting with this on a new Ada fruit Huzzah ESP8266 board. I installed their USB driver, or thought i had, since its a Kext I needed to do the restart option-r csrutil -disable thing and then reinstall it.

For a while now I had also had some issues with my Arduino Mega only being recognized on one of my two physical USB ports and just been too lazy to investigate since it was easier just to plug in to the 'back' port not the 'front'.
As part of fussing with the Huzzah driver I noticed and UNINSTALLED (aka deleted) an OLD FTDI USB Kext I must have put in before upgrading to El Capitan.   

That seemed to simultaneously fix both my front USB port with the Arduino Mega and allow the Huzzah to work on either port!  and here I thought driver/extension incompatibility issues were dead :)  now... to do carve out some time to actually make something before someone upgrades something!

posting in the hope that my random experience helps someone else struggling with this issue.
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: mark mccarthy on Jul 01, 2016, 02:32 am
As part of fussing with the Huzzah driver I noticed and UNINSTALLED (aka deleted) an OLD FTDI USB Kext I must have put in before upgrading to El Capitan.   
how did you go about doing this? I suspect I have the same situation.

thanks
mark.
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: sm_mirhoseini on Jul 18, 2016, 04:10 pm
Hi,
How could I add usbport1411 to my mac, at the moment it is working with wchusb1420 which is not compatible with "Arduino Leonardo".
Thank you
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: heaven_rover on Oct 03, 2016, 08:33 pm
My arduino have been worked OK under EI Capitan (don't ask me how)
But two days ago I moved to brand new Sierra Mac OS and got system halting during inserted USB cable ((
Two days of attempting different drivers haven't gave any result.

Finally I got the cure (http://www.mblock.cc/posts/run-makeblock-ch340-ch341-on-mac-os-sierra) and now it works good (no halts or hang and Arduino SDK 1.6.3 sees port /dev/tty.wchusbserial1420)

(most importan I think were the command sudo rm -rf /System/Library/Extensions/usb.kext
as it is despite any reasons (i.e. I hadn't see this "usb.kext" but possibly it was hidden)
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: aroramayank2002 on Oct 21, 2016, 04:08 pm
Worked for me:

 Reboot and press CMD+R immediately after hearing the startup sound to boot to Recovery Mode
   Open Terminal
   Execute the following command: csrutil enable --without kext
   Reboot

Install the following driver:

https://github.com/Makeblock-official/Makeblock-USB-Driver/blob/master/CH34x_Install.zip
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: AlanGP on Jan 02, 2017, 08:10 pm
I have the same problem with Arduino IDE 1.8.0 (new this week) and a Node MCU1.0. No idea why had to use my Win 7 PC which is a nonsense.
Title: Re: El Capitan - Arduino IDE serial port problems
Post by: Tendali on Feb 10, 2018, 06:27 pm
Hi, I tried everyone of these solutions, but none of them worked. But I found that there is a sure way to get rid of this problem. Dual-boot macOS/OS X [insert your os name here] and OS X Yosemite. And since the Yosemite installer is still up on the app store,
you can just download it and make a bootable flash drive, then partition your drive to accommodate the new OS and just restart while holding Alt and then boot of the USB drive and then hit re-install or install OS X.
But this is kind of a last thing I would try since it's not very fun to switch between OSes when you want to use arduino, but hey, it works.