If you do not boot Internet Recovery, you will boot into the existing Recovery Partition, which will only allow you to reinstall your existing operating system.You will need a viable Internet connection, preferably a fast one, and one that does not require a "login screen" for you to connect to the Internet.Read the * note to determine how to force Internet Recovery.Shut down your Mac, and restart it using macOS Internet Recovery.To learn how to use Time Machine read Use Time Machine to back up or restore your Mac.Īfter you have that backup and are satisfied with your ability to recover its files - or you decide that you do not need or want any of the information on that Mac, and understand that it will be irretrievably and forever lost, continue with the steps below. Update: Apple has also released a new 2021-006 Security Update for machines running macOS Catalina.Please refer to macOS Sierra: Revert to a previous macOS version.Īssuming you have no Time Machine or equivalent backup of your essential files and other documents, create one now because you will need to completely erase that Mac in order to downgrade its operating system from Sierra to any earlier version. Apple says that it has received reports suggesting these exploits were used in the wild, so iOS device users still running iOS 12 should update immediately.Īccording to Bleeping Computer, at least one of the bugs was likely used to deploy NSO Pegasus spyware on hacked devices.ĭevices unable to be updated past iOS 12 include the iPhone 5s, iPhone 6, iPhone 6 Plus, iPod touch 6, original iPad Air, iPad mini 2, and iPad mini 3. There's no word yet on what's included in the iOS 12.5.5 update, but according to Apple's release notes, it is a security update that addresses vulnerabilities with CoreGraphics, WebKit, and XNU. The update can be downloaded over-the-air by going to the Settings app, tapping on "General," and selecting the "Software Update" option. Apple today released an iOS 12.5.5 update for older iPhones and iPads that are not able to run the current version of iOS, iOS 15.
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