Hi @GD52David ,

Please look at this article:

https://daringfireball.net/2020/07/return_and_enter

It explains the difference between dedicated Return key and dedicated Enter key on Mac keyboards.

According to that article you can reassign dedicated Enter key with Keyboard Maestro software.

BTW, I'm always using Spacebar when autocomplete is active, it is not necessary even to use arrow-down key: simply start to type OFF and hit Spacebar - AutoCAD will start OFFSET command.