Replacement video card, 2010 iMac 27"


macrumors newbie
Original poster
Feb 9, 2020
I have a 2010 27" iMac with High Sierra as the most recent OS I can install. It has a Radeon 5750 video card with 1 Gb. I'd like to replace it with a card that supports Metal standards so I can update at least to Mojave and install some supported current apps like Pages and iMovie. Right now, this computer has nothing really useful as it was wiped and a clean install of HS was done. I purchased an Nvidea 765 but the form factor of the card is different than the original card and will not fit the heat sinc. Has anyone changed out a Radeon 5750 with something else that would allow me to install Mojave or Catalina?


macrumors P6
Feb 20, 2009
My opinion only, but not worth trying to "upgrade" an iMac that's 10 years old.
Time for something new, or at least, "newER"...
Last edited:


macrumors member
Nov 25, 2019
Oh come on friend, there is complete thread with over 180 pages just about this particular topic. Instead of just posting a new question in the middle of nowhere you might do a search first, on top of the page, right hand side. If you found it do not post again, just read the very first post #1 of this thread. It contains everything you ever wanted to know about "upgrade iMac 2011 graphics cards" - does apply to 2009 and 2010 models, too. I found it through google, another method.