![]() Restart your Mac while holding down the ‘Command+R’ keys.If the backup is stored on an external or network drive, then make sure this drive is available to your Mac.Reinstalling an earlier backup will undo all the changes you made since creating this backup, so make sure all of your documents and data are stored somewhere safe before proceeding. If you create regular Time Machine backups (and you should!) then you may be able to reverse a macOS update by restoring a Time Machine backup that you created before installing that update. Choose your startup disk, and then select ‘Install.’ Using a Time Machine backup.Once you see the macOS Utilities screen, select ‘Reinstall macOS’ and then click ‘Continue.’. ![]() Restart your Mac, while holding down the ‘Shift+Option+Command+R’ keys.It has seen seven different designs since 1998.If you’re on High Sierra 10.12.4 or later, and you want to revert to the version of macOS that shipped with your Mac, then you’re in luck! This is one of the easiest ways to downgrade your Mac: The First Intel Based iMac was introduced at Macworld Conference and Expo on Januby Steve Jobs. The iMac was first introduced at an Apple Special Event at the Flint Center, Cupertino on by Steve Jobs. It has seen 3 Generations from 2006-2019. The Mac Pro was first introduced at WWDC on August 7, 2006. The MacBook has seen 4 different designs since 2006. This Section covers the original 2006 13-inch MacBook all the way to the 2017 12″ Version. The 3rd Generation 13-inch MacBook Air was released in 2018. From 2017 on you could only get the 13″ Model. The Second Generation introduced in 2010 added an 11″ version. For the 1st Generation from 2008-2010 the screen size was or a 13.3″ and included a Intel Core 2 Duo Processor. The MacBook Air was first introduced at Macworld San Fransisco by Steve Jobs on January 15th, 2008. The MacBook Pro has seen five redesigns over the last 15 years. The MacBook Pro was introduced by Steve Jobs at Macworld Conference & Expo on January 10th, 2006. #UpgradeorDowngradeMacOS Index of Intel-Based Mac Hardware From (2006-2020) You can keep track of future updates from my Twitter Account using the hashtag – In the future when Apple releases new hardware or OS, I will update this page. ![]() Fun Hardware InfoĪs of 5/1/321, Apple has released over 150 different Intel Model Identifiers. An example of this is a MacBook Pro released with 10.13 but later is shipped with 10.14. NOTE! The “Shipping OS can change to a newer OS release as the hardware gets older. ![]() This is the IR Version that you will see if you use Shift-Option-⌘-R. The “Shipping OS Version” is the macOS version that your Mac originally shipped with from the factory.
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