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In fact, resetting the SMC and the PRAM takes only a few seconds. This may sound like a technical solution, but it isn’t.
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Make sure you reboot your MacBook Pro every time you connect a peripheral.
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Continue holding it until the Apple logo appears. After you hear the startup sound, press the SHIFT key immediately.To run your MacBook Pro in Safe Mode, do these: Hence, if the reason why your startup disk cannot be mounted is a faulty app or program, booting your MacBook Pro in Safe Mode might just fix your problem. All other programs and apps that are unnecessary will never be loaded. When booted in Safe Mode, your MacBook Pro will start only with the minimum requirements and utilities needed. Wait for the process to finish before restarting your machine.Click the First Aid button to start fixing your drive.From the left pane, choose your MacBook Pro hard drive.But while doing that, press the CMD and R keys as well until the Apple logo appears. Turn it back on by pressing the Power button.To hopefully fix your hard drive, follow these steps: If that is the case, you have to boot your MacBook Pro in Recovery Mode via Disk Utility. However, if that does not work, then you might want to look into the angle that there might be something wrong with your hard drive.
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Sometimes, restarting your Mac is more than enough to fix the problem. Below are a few ways to fix a MacBook Pro that can’t mount its startup disk: 1. Going forward, assuming you already have a backup of your important files and data, let’s proceed with resolving the problem.
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Then again, drive mounting can be performed manually using the Disk Utility of your machine. In most cases, mounting is an automatic process that happens as soon as the hard drive is connected to a Mac or MacBook Pro. Once you have backed up all your data, you can try a few fixes to your “unmountable” hard drive problems.Ĥ Fixes to a MacBook Pro That Can’t Mount Its Startup Disk