MacBook Pro (13-inch, Mid 2012)

Model Identifier: MacBookPro9,2
Part Numbers: MD101xx/A, MD102xx/A
Newest compatible operating system: macOS Catalina 10.15.7

MacBook Pro (15-inch, Mid 2012)

Model Identifier: MacBookPro9,1
Part Numbers: MD103xx/A, MD104xx/A
Newest compatible operating system: macOS Catalina 10.15.7

MacBook Pro (Retina, 13-inch, Late 2012)

Model Identifier: MacBookPro10,2
Part Numbers: MD212xx/A, MD213xx/A
Newest compatible operating system: macOS Catalina 10.15.7

MacBook Pro (Retina, 15-inch, Mid 2012)

Model Identifier: MacBookPro10,1
Newest compatible operating system: macOS Catalina 10.15.7