Macs That Can't Run Mountain Lion or Lion. If you have an iMac, MacBook, MacBook Pro, or Mac mini model that was originally released in Early/Mid 2006, the latest version of Mac OS X your system supports is Snow Leopard.
Max Supported Version of Mac OS X (OS X, macOS) The maximum version of Mac OS X, OS X, or macOS supported by each G3 and later Mac follows. For complete specs on a particular system, click the name of the Mac.
For all Macs that are compatible with a specifc maximum supported version of Mac OS X - courtesy of EveryMac.com's - click the OS of interest. Systems with 'Current' support the current version of the Mac operating system, macOS Mojave (10.14). Systems marked 'Current.' (Current and an asterisk) also are capable of running macOS Mojave, but there may be some unsupported features. Systems with other OS versions listed and an asterisk are capable of running that version of the operating system (but no higher) and with limitations.
See the specs page for a particular model for details. If you are not sure which Mac you have, look it up with EveryMac.com's feature. If you need help, refer to.
![Latest version of mac os for macbook pro Latest version of mac os for macbook pro](/uploads/1/2/5/4/125401791/228150331.jpg)
If you find this page useful, please it. Also see: for G3 and Later Macs. 1 Apple Computer Max Supported Mac OS 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1.
Chuck an SSD in there and I'd say throw on 10.13. Though with the standard stock drive, it'll run much slower than Mountain Lion does.
Certainly still usable, but without doubt it'll be noticeably slower. If it was my own machine I'd upgrade it without hesitating, even without an SSD. However if your friend is happy with how it is at the moment, I say if it ain't broke, don't fix it.
Partly because if something goes wrong, it doesn't look as they expected, or it doesn't run as well as they expected, you'll likely get the blame as the person who crippled their iMac. Just to share my most recent experience. (am user not pro.) - I had the same work machine iMac mid 2011 and same question as you 3 wks ago. Did few hrs of research and decided to upgrade from Sierra to High Sierra. Sadly, I failed to realise some applications like Filemaker11 or FM 13 dont work with HS 10.13. Finally this week, decided to pull out the legendary grey disc (snowleopard) reinstall.
C / option failed. Cmd-R erased APFS + reformat led me to infamous grey screen of death. Repeat, tried - grey disc, bootable usb, external cd drive, reset xxx yyy zzz. Finally after 4-5hrs slowslowslow internet recovery (Mountain Lion) brought my iMac back to life again.total time wastage 10-12hrs. So do check if your applications work w 10.13 first before upgrade first post here from 10.9.5 Mavericks.
updated to El Capitan 10.11.6 (15G21013) after Mavericks random UI lag, Mail and iMessage trouble. Buttery smooth now.