Error when uploading to Sunfounder Mega 2560 on MacBook running Catalina

I am trying a Sunfounder Mega 2560 on my Mac but getting an error message when I try and upload the code. The following is the error message I am receiving.

Arduino: 1.8.12 (Mac OS X), Board: "Arduino/Genuino Mega or Mega 2560, ATmega2560 (Mega 2560)"

fork/exec /Volumes/Data Drive/p00874372/Library/Arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-g++: bad CPU type in executable
Error compiling for board Arduino/Genuino Mega or Mega 2560.

This report would have more information with
"Show verbose output during compilation"
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