logic/motherboard swap (need to upgrade a late-2011 chassis)

[guitarkevin]

Hello,
I'm trying to determine what the latest version logic/motherboard is hot swappable with a late-2011 chassis. One w/o integrated RAM or retina.

I'm kind of sure I can go to Mid-2012, which will do the job for Pro Tools First system requirements (Mojave 10.14.5 or Catalina 10.15.6 or higher). My OS tapped out at Mojave 10.13.6. But for the cost, I might as well get the latest possible board to handle any system requirements Pro Tools may throw out there.

Any help or advice would be appreciated.

 

[Audit13]

I know the mid-2012 13" will fit in a late 2011 13". Don't know about the 15".