Perform one last Time Machine backup before the upgrade.Boot into Yosemite Recovery (⌘-R) and run Disk Utility First Aid on your startup drive.Subscription for continued realtime features is purely optional. macOS (/ m æ k o s / previously Mac OS X and later OS X) is a proprietary graphical operating system developed and marketed by Apple Inc. Download and run the free Malwarebytes for Mac before any upgrade to see if any malware presently exists on your Mac, and if found, can be removed.Although the vendor sites are the last word on application support, you may find RoaringApps helpful too. Also check with your third-party applications vendor sites that their applications remain compatible with High Sierra, and preferably, are 64-bit applications. The only full upgrade installers are in the Mac App Store, and here is the link to How to upgrade to macOS High Sierra.īefore you leap from Yosemite, check the specific printer/scanner vendor driver sites to verify if either have High Sierra driver support. Anything from Apple's download servers is an update, and not a full installer for that version of the operating system.
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