Disk utility on mac startup
The differences between Internet Recovery and regular Recovery
At this point you can release the keys and your Mac should boot as normal. This makes booting your Mac a simple and pleasant experience, but can also hamper troubleshooting efforts. But instead of finishing the boot and bringing you to the default OS X login GUI, it gives you a text terminal which can be used for everything from advanced troubleshooting to hard drive repair.
Target Disk Mode is a very useful feature exclusive to Macs that, in effect, lets you turn your Mac into an unnecessarily complex external drive.
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Repair Boot Disk in Mac OS X with Disk Utility & Recovery HD
Filed Under: Browser plug-ins and extensions are disabled. Disk Utility: If you want to choose a different startup disk before quitting, choose Startup Disk from the Apple menu.
When that happens, you see a spinning globe instead of an Apple logo during startup. Learn more about these key combinations. If you need to connect to a Wi-Fi network, move your pointer to the top of the screen, then choose a network from the Wi-Fi menu in the menu bar.
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Startup is complete when you see the utilities window: After starting up from macOS Recovery, select from these utilities, then click Continue: Release the keys after you hear the second startup chime. The PRAM will be reset. Holding down the Option key during startup will show you a boot screen with all bootable devices listed. You can use the mouse or the keyboard to select a device to boot into. Sometimes discs can get stuck in your optical drive. When you cannot seem to get them out, you may panic, but just try restarting while holding down either the Eject key, F12 key, or your mouse or trackpad button.
Your disc will be ejected in a flash after doing this.
How to Fix Grey Screen at Startup on Mac
If your setup includes a compatible network server NetBoot , you can hold down the N key during startup to attempt a network boot. Target Disk Mode is a great way to retrieve your files from your Mac if your machine refuses to boot properly.
Follow our guide on Target Disk Mode for more information on how it works. OS X includes a boot option called Safe Mode. Start up your machine while holding down the Shift key to have OS X only load required kernel extensions and login items.