Upgrade iMac Mid 2010 from OS X Yosemite 10.10.5
How do I go about upgrading my operating system? I am currently running OS X Yosemite 10.10.5 on my iMac (27-inch, Mid2010) Processor 2.8 GHz Intel Core i5 Memory 4GB.
iMac 27″, OS X 10.10
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How do I go about upgrading my operating system? I am currently running OS X Yosemite 10.10.5 on my iMac (27-inch, Mid2010) Processor 2.8 GHz Intel Core i5 Memory 4GB.
iMac 27″, OS X 10.10
Several steps you could take...
You can upgrade to 10.11, 10.12, or 10.13, see sys requirements...
https://support.apple.com/en-us/HT206886
https://itunes.apple.com/app/os-x-el-capitan/id1147835434?ls=1&mt=12
https://support.apple.com/kb/sp742?locale=en_US
https://itunes.apple.com/us/app/macos-sierra/id1127487414?ls=1&mt=12
https://support.apple.com/kb/sp765?locale=en_US
https://itunes.apple.com/app/macos-high-sierra/id1246284741?mt=12
A Mid 2010 iMac can be upgraded to macOS 10.13 High Sierra.
the directions are at > How to upgrade to macOS High Sierra - Apple Support
Upgrade iMac Mid 2010 from OS X Yosemite 10.10.5