Security News > 2021 > November > macOS Monterey update causes some Macs to become unbootable
A growing number of Mac and Macbook owners report that their devices become unbootable after attempting to update to the latest version of macOS, codenamed 'Monterey.
Since macOS Monterey has been released, social media is filling up with a growing number of complaints about their devices becoming "Bricked" or unbootable after upgrading.
This issue only affects Mac devices before 2019 and does not appear to affect newer Macs with M1 chips.
Others found a way to revive their devices by booting into DFU, so clearly, not all of the devices that failed to upgrade got bricked.
There's a long history of problems around older Apple Macs attempting to update to newer macOS versions, so what's happening now isn't unprecedented.
With macOS 11 and macOS 10.15 still supported with regular security updates, you are at no risk of using these older versions for the time being.