I have an old 5,2 17” June 8, 2009 MacBook Pro that I want to upgrade the RAM in, can I put some slightly older MacBookPro5,1 RAM in it, or will it not function right? I’m assuming it will mess up the machine if I put older RAM in it but im not sure. It’s crucial ram and there are two 4GB sticks, if that helps at all, thanks again!



Both MBPs use the same RAM architecture: 204-pin PC3-8500 (1066MHz) DDR3 SO-DIMM.

Information from macOS app MacTracker.

8GB is the maximum supported RAM for this MBP.

Disclaimer: I'm a satisfied user of MacTracker and have no financial or other connection with the developer Ian Page.

  • So you’re saying that it should work if I take out the older stick and put in two of the other 4GB ones it will work? – Liam Feb 7 at 20:55
  • Yes. Identical RAM. Follow instructions at Apple Support on how to replace. Video from OWC has some rocking' tunes! Be methodical and minimize static. – IconDaemon Feb 7 at 22:27
  • Mactracker so good & useful. – Solar Mike Feb 8 at 5:58

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