If that happens, then you can use your backup to migrate from, a slower process but often more reliable. Before doing so, check again that your backups are available, in case this performs a clean install which doesn’t hook up with your Mac’s existing Data volume. If you have a spare USB ‘thumb’ drive, or can make a bit of space on an external disk, you can turn that into an external bootable installer disk and perform the upgrade from there. Once your Mac has completed all its post-startup tasks, open the Software Update pane and run the upgrade from there. If you can’t upgrade the standard way, there are several other approaches you can try instead.īooting your Mac in Safe mode, with the Shift key held, is one of the recognised ways of solving macOS upgrade or update problems. To check on progress with this, open the Security & Privacy pane and switch to the FileVault tab. However, after turning FileVault off it can take a long time for decryption to complete, as it’s performed in the background, when your Mac is awake and powered from mains/AC. Apple’s normal recommendation then is to turn FileVault off, but some report that doesn’t appear to do anything. Some Macs with FileVault enabled (but without a T2 chip) can run into difficulties, and prove unable to complete the upgrade. If necessary, have a good housekeeping session to release more. If your Mac is short of free disk space, you’ll need to clean up non-essentials such as snapshots restarting it in Safe mode often frees up additional space which has been used for temporary storage. Oddly, though, some Macs complain that they can’t install the necessary firmware update and won’t upgrade to Monterey as a result. Upgrading from the latest security-patched version of Catalina or Big Sur is least traumatic, as your Mac’s firmware should already have been updated ready for Monterey. Never rush a major upgrade: if you don’t have time now, leave until you have. Take all the usual precautions, ensuring that you have at least one, preferably two or more, complete recent backups, and have plenty of time for the upgrade and any fixes afterwards. Don’t forget that, apart from limited security fixes, Apple only normally fixes bugs in its current release of macOS, so if you’re suffering problems still in Big Sur or earlier, you can rest assured that they won’t ever be fixed there.įor the great majority of Mac users, upgrading through Software Update or the App Store is the most straightforward to try first. While it’s not free from significant bugs yet, with the recent 12.2.1 update they’re generally tolerable, and this is a good time to assess your options if your Mac is compatible with Monterey. If you’re still running Catalina or Big Sur, you’re probably now wondering whether it’s safe yet to upgrade to Monterey.
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