Startup Disk Cleanup on Mac OS X Yosemite Users of OS X Yosemite and earlier face a situation when the Other folder takes up the significant part of their Mac’s storage. Other is a tricky folder containing multiple types of files, disk images, system and user caches, fonts, app plugins, extensions, etc. How To: Dual Boot Mac OS X Mavericks 10.9 & Yosemite 10.10 How To: Create a Bootable Install USB Drive of Mac OS X 10.11 El Capitan How To: Hunt Down Space-Hogging Files on Your Mac with Disk Inventory X How To: Format an external hard drive for Mac OS X. Best equaliser for macos x.
By default, your Mac starts up from its built-in hard disk, but a startup disk can be any storage device that contains an operating system compatible with your Mac. For example, if you install macOS on an internal or external drive, your Mac can recognize that drive as a startup disk. You can then follow the steps in this article to start up from it. Xcode 8.2.1 for el capitan.
Use Startup Disk preferences
When you use Startup Disk preferences to select a startup disk, your Mac starts up from that disk until you choose a different one.
Mar 12, 2020 Plug the bootable installer into a compatible Mac. Use Startup Manager or Startup Disk preferences to select the bootable installer as the startup disk, then start up from it. Your Mac will start up to macOS Recovery. Learn about selecting a startup disk, including what to do if your Mac doesn't start up from it. Choose your language, if prompted. Restart your Mac. Immediately hold down the Command (⌘) and R keys after you hear the startup sound to start up in OS X Recovery. When the Recovery window appears, select Disk Utility then click Continue. Select the indented volume name of your startup disk from the left side of the Disk Utility window, then click the Erase tab. Dec 01, 2016 Zhuo Mao ZM-R6200c for Macbook Pro logic board repair, 2011 GPU issue 820-2915 - Duration: 1:42:45. Louis Rossmann 680,727 views.
If you see a message that your security settings do not allow this Mac to use an external startup disk, check the External Boot setting in Startup Security Utility.
Use Startup ManagerStartup Disk For Mac Yosemite National Park
When you use Startup Manager to select a startup disk, your Mac starts up from that disk once, then returns to using the disk selected in Startup Disk preferences.
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If your Mac is using OS X Lion 10.7.3 or later, you can also use this method to start up from your Time Machine backup disk. Startup Manager identifies your Time Machine backup as ”EFI Boot.”
If you can't select your startup disk or start up from it
Check for these possibilities if you can't see your disk in Startup Disk preferences or Startup Manager, or your Mac won't start up from it.
Check for a compatible operating system on the startup disk
Make sure that your startup disk is using a version of macOS that is compatible with your Mac.
To start up from an external disk with macOS Catalina 10.15 or later, the disk must connect via USB-A, USB-C, or Thunderbolt, not FireWire.
Check startup security settingsStartup Disk Full Mac Yosemite
If you're using a Mac that has the Apple T2 Security Chip, check the settings in Startup Security Utility. These settings determine whether your Mac can start up from another disk.
Check for Option ROM firmwareStartup Disk For Mac Yosemite Update
If you're in Startup Manager and can't see a third-party startup disk, the startup disk could be using Option ROM firmware. To enhance system security, Mac computers with up-to-date software don’t show devices that use Option ROM firmware until you load their firmware. To do that, press Option-Shift-Command-Period while in Startup Manager. If your startup disk appears, do that each time you want to start up from it or from another disk connected to it.
Mac Startup Disk Not Showing
If you're using a firmware password, the ability to load Option ROM firmware is disabled as an additional security protection.
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