User configuration file is "/Users/dveach/.avrduderc" System wide configuration file is "/Users/dveach/Library/Arduino15/packages/arduino/tools/avrdude/6.3.0-arduino17/etc/nf" Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 bytes for local variables. Sketch uses 924 bytes (2%) of program storage space. Arduino: 1.8.19 (Mac OS X), Board: "Arduino Uno" I suspect it's something to do with Catalina, or possibly the Mac Pro, but I cannot figure it out. On my Mac Pro (2010 5,1) running Catalina (10.15.6) I can compile but the upload fails with AVRDude errors. So I know I have a working Uno board and USB cable. I can compile and upload blink to the Uno. Everything works fine on my current Mac mini running Mojave. However I recently purchased a Mac Pro and can't get avrdude to upload a sketch. I've done a fair amount of Arduino programming in past years on multiple Mac computers (MacBook Pro and mini).
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