How to Run 64-Bit Only Mode Mac OS

Advanced Mac users, administrators, and developers who wish to test Mac OS in 64-bit mode can do so with the help of a terminal command. Essentially this will only allow 64-bit applications and processes to run on the Mac, which can be helpful for discovering what (if any) apps, tasks, components, processes, and items may need updating, or could be problematic in future Mac OS releases that no longer offer full 32-bit compatibility. While 64-bit only mode is active, no 32-bit processes will execute at all.
















