What if I don't update macOS to a supported version? Learn more about the latest macOS releases. The October 2021 update (16.54) is the last build to support macOS 10.14 Mojave. Note that new installs of Microsoft 365 for Mac will also require macOS 10.15 or later. Upgrading your operating system to macOS 10.15 or later will allow Office updates to be delivered for your apps. If you continue with an older version of macOS, your Office apps will still work, but you'll no longer receive any updates including security updates.

This indicates that whatever the problem may be, it doe not involve any hardware issue.Starting with the November 2021 update (16.55) macOS 10.15 Catalina or later is required receive updates to Word, Excel, PowerPoint, Outlook and OneNote. 'We did, however, discover that if I create a new user, then the Quicktime crashes do not arise when logged in as this new user. We tried all of the usual tricks, such as removing plist files and even the entire Preferences folder. 'I spent over 2 hours on the telephone to Apple support today without making any progress toward resolving the issue. 'After updating to OS 10.3.9 and installing Quicktime Pro 7, I have found that Quicktime crashes immediately upon clicking on Show Movie Properties. Meanwhile, Edwin Burmeister reports that creating a new user account resolves the crash issue, indicating that a user-specific issue may be at hand. Reapplying the 10.3.9 combo updater had no effect as well.' 'Attempts to revert back to QT 6.5 have been unsuccessful, as well as additional attempts to re-install QT 7. When QT 7 is launched normally, I get one bounce in the dock, and then the application just hangs.

The installation appeared to be fine, but upon restart, the AppleScript that is supposed to launch Quicktime 7 eventually times out. Graham Wilson writes 'I installed Quicktime 7 on my Dual 2ghz G5, running OS X 10.3.9 (no Tiger installation yet). And the movie plays back fine (the files are huge, not at all as small or as high quality as I expected, and there are so few options), but when I try to Show Movie Properties on any of the clips it crashes QuickTime completely.' 'I just upgraded to Quicktime 7 Pro today for my Panther install and decided it was time to try out the H.264 codec I have been hearing so much about, so I compressed a DV Quicktime movie with the codec using compressor. Operating in 10.3.9, QT 7 quits when you select Show Movie Properties (Command-J), from the Window menu, for an open movie file.' 'I downloaded the new QuickTime 7.0 and purchased a new Pro key. The same issues do not occur with QuickTime 7 under Mac OS X 10.4 (Tiger). Several readers report issues with QuickTime 7 when running under Mac OS X 10.3.x.

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