Can't upload any program onto Arduino Uno

Using Arduino Avrdude, stk500, Bootloader issues
#1

HELP!

I am trying to upload a program onto my Arduino Uno (even happens when I upload a blank program). And I am getting this error:

avrdude: Version 6.3-20190619
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch

System wide configuration file is "/private/var/folders/5c/brbfv9rd6yq4x6bmv9g4vyph0000gn/T/AppTranslocation/F9828822-D6DD-486D-803C-C99CB312C966/d/Arduino.app/Contents/Java/hardware/tools/avr/etc/avrdude.conf"
User configuration file is "/Users/forestedwards/.avrduderc"
User configuration file does not exist or is not a regular file, skipping

Using Port : /dev/cu.usbmodem14111
Using Programmer : arduino
Overriding Baud Rate : 115200
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x00
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x00
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x00
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x00
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x00
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x00
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x00
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x00
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x00

avrdude done. Thank you.

An error occurred while uploading the sketch

I have my board set to Arduino/Genuino Uno, and my serial port set to dev/cu.usbmodem14111 (Arduino/Genuino Uno)

I have uninstalled and reinstalled the Arduino IDE to multiple versions and still get the same error

I was able to upload programs perfectly fine the other day, and I have no idea why it isn't working now.

Help is very much appreciated, thanks!

#2

Do you have anything connected to it?

#3

It might be possible that you have something connected to the rx and/or tx pins of the uno. If this is not the case then there's probably some problem with the board itself.

#4

I saw an error like this when using a Redboard and, in that case, I had to quickly double-click the reset button on the board to get it into bootloader mode. You said Arduino Uno, but it's maybe something to consider.

#5