Arduino Uno does not work with MacOS

fork/exec /private/var/folders/fd/shyr_f99675brxxw9vw_cdch0000gn/T/AppTranslocation/73EC1BAD-8FEA-4708-9040-B3327A08CF37/d/Arduino.app/Contents/Java/hardware/tools/avr/bin/avr-g++: bad CPU type in executable Fehler beim Kompilieren für das Board Arduino/Genuino Uno.

This is what I get. Someone an Idea?

This is caused by using the 32 bit tools of the Arduino AVR toolchain with macOS Catalina. Arduino already has a fix for this and you can download the beta test version of it here: https://github.com/arduino/Arduino/pull/8976#issuecomment-503638485