[dr_j_]

Patched Catalina at least runs flawlessly on my mid 2010 MBP (7.1). (Note also, upgraded to 16GB ram — officially unsupported — and 500GB SSD). The machine absolutely flies. Using it for home recording and as my daily development (C++ mostly) driver.

[copperx]

How did you upgrade the RAM? Isn't it soldered?

[dr_j_]

Thankfully not, I’m terrible with a soldering iron. 13 inch mid 2010 MBP, model number 7.1, I think.

I heard the latest MBPs have soldered ram. Horrible and one of the reasons why I’m not thinking of buying one (besides them being rather pricey!).