MacOS Catalina (10.15) would mark the completion of Apple's transition to 64-bit technology and no longer support 32-bit applications. 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".
#Mac os 10.13 install#
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.