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If Command R is not working on your Mac, you need to check whether it is a keyboard problem.
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Read More Solution 2: Use another Keyboard Of course, you can also use this feature to fix other connected drives. Disk Utility: if there is something wrong with the startup disk on your Mac, you can use this option to access Disk Utility and then use it to repair the startup disk.However, in this mode, some browser features are not available. Get Help Online: when your Mac computer is unbootable, you can click it to open Apple’s support page using Safari and look for the solutions to your issue.Reinstall macOS: this feature allows you to reinstall your macOS when the system encounters issues and can’t boot.
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You need to connect the backup drive to your Mac in advance.
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How to Recover Data from a Mac That Can’t Boot?.Solution 7: Use Mac Internet Recovery to Reinstall macOS.
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Solution 3: Make sure Your Keyboard Is Properly Connected to Your Mac.If you don’t know why and how to solve the issue, you can read this MiniTool post to get the answers. However, sometimes you find that Mac won’t boot into Recovery Mode. When your Mac is unbootable, you can use the Command-R combination to boot into Recovery Mode and use the options in it to solve the issue.
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