This work is not free; it is very time consuming with no direct reward. I need your support. Thank you for buying your Macs and other gear at B&H Photo, which provided the machine for testing. Subscribing to my photographic publications is another way to help support work like this—consider that AppleCare alone is $350 on $4000 to $7000 machine.
Consult with Lloyd to design a complete system for photography or similar including backup and data safety.
Intel-based Macs are note remotely competitive for general Photoshop work.