1. iMore Question's Avatar
    My iMac manufacture date is 2007. I have added 2GB of memory so it now has 4GB. It is running very happily on Yosemite, but I'm a bit nervous of adding any new operating system for its age.
    10-19-2015 11:01 PM
  2. Gtech21's Avatar
    The requirements say an iMac from mid 2007 and forward are compatible. So if it is mid 2007 it will work. I personally would not if Yosemite is working well for you. 10.11 El Capitan requires a bit more power and it may slow things down for you. I've seen 10.11 El Capitan work well with at least 8 gb of ram on the newer computers.

    Sent from my iPhone using Tapatalk
    10-20-2015 09:14 AM
  3. kch50428's Avatar
    My mid 2008 Macbook Pro runs ElCap better than it did Yosemite...
    10-20-2015 09:36 AM

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