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Starting with the update to macOS 10.13.3, launching a 32-bit application would display an alert that it "is not optimized for your Mac. Deprecation of 32-bit supportĪpple notified developers that High Sierra would be the last version of macOS to run 32-bit applications "without compromise". This requires using a patch to modify the install image. It is possible to install High Sierra on many older Macintosh computers that are not officially supported by Apple. iMac: Late 2015 27" or later, Mid 2017 21.5" or newerĮxternal graphics processor support requires a Thunderbolt 3-enabled Mac:.HEVC hardware acceleration requires a Mac with a sixth-generation Intel processor or newer: MacOS High Sierra runs on the following Macintosh models with at least 2 GB of RAM and 14.3 GB of available disk space: FaceTime, supports capture of Live Photos from streaming video.Mail Search, is improved with more options.Spotlight, adds flight tracking features.
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HEVC, adds support for a much more efficient H.265 video codec.New APFS file system, also introduced in iOS 10, replaces the decades-old HFS+ drive format with a modern replacement.
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