Restart your MacBook Pro and see if it worked.Next, press the CTRL, SHIFT, Option, and Power keys for 10 seconds and release them together.If resetting the PRAM does not fix the problem, try resetting the SMC.Restart your MacBook Pro and check if the problem persists.Hold them until you hear the second startup tone. After you hear the startup sound, press the Option, CMD, P, and R keys.To reset the PRAM and SMC, follow these instructions: In fact, resetting the SMC and the PRAM takes only a few seconds. This may sound like a technical solution, but it isn’t. Make sure you reboot your MacBook Pro every time you connect a peripheral. Identify the exact cause of the problem by connecting each of the peripherals one by one.If it boots properly, then one of the peripherals is causing the problem. You may leave the keyboard and mouse attached in the meantime. Disconnect all external peripherals connected to your MacBook Pro, including printers, external hard drives, USBs, and scanner.It is possible that a faulty peripheral connected to your MacBook Pro could be causing your startup disk problems. If your MacBook Pro boots up properly, then uninstall any program or app you suspect is causing the problem.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. 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. 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
Situations like this can be very annoying, especially if you have critical and important files stored on the “unmountable” hard drive.įret not, because we will teach you what to do if your MacBook Pro won’t mount its startup disk. That means if your Mac or MacBook Pro can’t mount its startup disk, it is likely that you will experience problems, like your computer gets stuck on the login screen or it does not boot at all. Macintosh HD, or the MacBook internal hard drive, is basically the startup drive of most Apple computers. Please review EULA and Privacy Policy Outbyte.
In order to use the program, it needs to be purchased and activated first.ĭeveloped for macOS See more information about Outbyte and uninstall instructions. Clean and Optimize Your Mac to Improve Performance with Outbyte macAries
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