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Third-party plugged accessories can also freeze a Mac computer. Method 3: Unplug All Third-Party Accessories from Your Mac If you are trying to install or update your macOS, you can also do the job in Safe Mode. Then, you can enter your password if necessary. You can see red Safe Mode on the upper right side of the screen.
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Besides, it can fix some issues on your Mac machine. Your Mac computer can run in a pure environment without hardware failure or other startup issues after the machine boots into Safe Mode.
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Read More Method 2: Use Safe Mode to Solve the Issue
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