New Uno user with OSX- unable to verify any sketches.

Good afternoon. I have been through the various trouble shooting guides but can't find a solution to our problem. My son and I have an UNO starter kit and the latest Arduino IDE running on OSX 10.13.6. When we try the very simplest sketch (blinking LED) we get the following error message:

Arduino: 1.8.9 (Mac OS X), Board: "Arduino/Genuino Uno"

/private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/arduino-builder -dump-prefs -logger=machine -hardware /private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/hardware -hardware /Users/user/Library/Arduino15/packages -tools /private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/tools-builder -tools /private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/hardware/tools/avr -tools /Users/user/Library/Arduino15/packages -built-in-libraries /private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/libraries -libraries /Users/user/Documents/Arduino/libraries -fqbn=arduino:avr:uno -vid-pid=0X2341_0X0043 -ide-version=10809 -build-path /var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/arduino_build_634703 -warnings=all -build-cache /var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/arduino_cache_735343 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.arduinoOTA.path=/private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.arduinoOTA-1.2.1.path=/private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.avr-gcc.path=/Users/user/Library/Arduino15/packages/arduino/tools/avr-gcc/5.4.0-atmel3.6.1-arduino2 -prefs=runtime.tools.avr-gcc-5.4.0-atmel3.6.1-arduino2.path=/Users/user/Library/Arduino15/packages/arduino/tools/avr-gcc/5.4.0-atmel3.6.1-arduino2 -prefs=runtime.tools.avrdude.path=/private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.avrdude-6.3.0-arduino14.path=/private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/hardware/tools/avr -verbose /Users/user/Documents/Arduino/blink19/blink19.ino
/private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/arduino-builder -compile -logger=machine -hardware /private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/hardware -hardware /Users/user/Library/Arduino15/packages -tools /private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/tools-builder -tools /private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/hardware/tools/avr -tools /Users/user/Library/Arduino15/packages -built-in-libraries /private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/libraries -libraries /Users/user/Documents/Arduino/libraries -fqbn=arduino:avr:uno -vid-pid=0X2341_0X0043 -ide-version=10809 -build-path /var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/arduino_build_634703 -warnings=all -build-cache /var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/arduino_cache_735343 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.arduinoOTA.path=/private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.arduinoOTA-1.2.1.path=/private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.avr-gcc.path=/Users/user/Library/Arduino15/packages/arduino/tools/avr-gcc/5.4.0-atmel3.6.1-arduino2 -prefs=runtime.tools.avr-gcc-5.4.0-atmel3.6.1-arduino2.path=/Users/user/Library/Arduino15/packages/arduino/tools/avr-gcc/5.4.0-atmel3.6.1-arduino2 -prefs=runtime.tools.avrdude.path=/private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.avrdude-6.3.0-arduino14.path=/private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/hardware/tools/avr -verbose /Users/user/Documents/Arduino/blink19/blink19.ino
Using board 'uno' from platform in folder: /private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/hardware/arduino/avr
Using core 'arduino' from platform in folder: /private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/hardware/arduino/avr
Detecting libraries used...
/Users/user/Library/Arduino15/packages/arduino/tools/avr-gcc/5.4.0-atmel3.6.1-arduino2/bin/avr-g++ -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10809 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR -I/private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/hardware/arduino/avr/cores/arduino -I/private/var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/AppTranslocation/6D58802A-9A19-41D3-91BA-4ED8EA8D6D60/d/Arduino-2.app/Contents/Java/hardware/arduino/avr/variants/standard /var/folders/60/7w856r0j2mg3314hyp0xjghw0000gn/T/arduino_build_634703/sketch/blink19.ino.cpp -o /dev/null
fork/exec /Users/user/Library/Arduino15/packages/arduino/tools/avr-gcc/5.4.0-atmel3.6.1-arduino2/bin/avr-g++: no such file or directory
Error compiling for board Arduino/Genuino Uno.

It seems to be a problem with the Library but neither of us are very clever when it comes to code (this is our first attempt) and I can't seem to solve this problem. Is anyone able to offer any insight?

Much appreciated!
Tom

This error indicates you need to take some drastic action. Be aware this is somewhat advanced and will remove any boards you have installed via Boards Manager:

  • In the Arduino IDE, click the link on the line following File > Preferences > More preferences can be edited directly in the file. This will open the Arduino15 (or similar name depending on OS) folder.
  • Delete all files and folders under the Arduino15 folder except for preferences.txt. Please be very careful when deleting things from your computer. When in doubt, back up!
  • Restart the Arduino IDE

Verify that you can now use your board before reinstalling any packages via Boards Manager.

Thanks Pert, that works!

We really appreciate you taking the time to reply. On with the coding!

You're welcome. I'm glad to hear it's working now. Enjoy!
Per