this is useful
There are two ways to check processors and detailed information of a specific Mac.
1. There is very detailed information on this website. You can put your serial number in.
https://support.apple.com/specs
2.Another way to do it:
Click on the “apple” icon on the top right corner of your
screen—”About this Mac”—“Overview”—”system report”.
linkstream2 microblog 