This app needs to be updated by its developer to improve compatibility.' macOS Mojave (10.14) would be the final major release to even run 32-bit software at all. 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.

Siri, supports preference learning for music and is more tightly integrated with iTunes, and text to speech is improved.

Safari, now contains Intelligent Tracking Prevention, the ability to disable autoplay, site-based browser settings, site-based always-on reader view.

Photos, adds an expanded sidebar, improved organization tools, integrates with advanced editing tools, supports more Memories modules and live photo editing tools, and included People/Faces.

Integrated VR support, contains support for creating, editing and interacting with VR media.

Metal 2, adds a newer version of the graphics display system, which supports VR and extended GPU functionality at higher speeds.

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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