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1. #Mac os x startup disk utility how to
2. #Mac os x startup disk utility mac os
3. #Mac os x startup disk utility serial number
4. #Mac os x startup disk utility install
5. #Mac os x startup disk utility upgrade

#Mac os x startup disk utility mac os

You can format these devices as APFS and try to make a bootable backup, but if the performance of the device is too slow to be practical, then we recommend you choose Mac OS Extended (Journaled) for the format. "Slim" backup devices, 2.5" disks) APFS is not designed for these devices, macOS boot performance may be poor. If your destination device is an HDD with a rotational speed of 5400RPM (or slower): (e.g. Choosing a Format for your destination volume If you do not see the Scheme option, go back two steps and select the whole disk device, not one of the volumes on the disk. You can set the name to whatever you like, but set the Scheme to GUID Partition Map. Erase the specified diskĬlick on the Erase button in Disk Utility's toolbar, then configure the name, format, and partitioning scheme of your disk. Click the Eject button next to any volumes on the disk to preemptively unmount them before erasing the disk. because Spotlight prevents the unmount request). Unmount any volumes on the specified diskĭisk Utility occasionally has problems with unmounting a volume while attempting to erase it (e.g.

If your disk is a Fusion device, you may erase the "container" within it instead. You must select the whole disk to correctly initialize the device. Please pay particular attention to selecting the disk, not one of the volumes on the disk.

#Mac os x startup disk utility serial number

A startup disk will often include the manufacturer's serial number in the title (e.g. The name of a new disk will often include the manufacturer’s name (e.g. This disk should not be the same as your startup disk. Before doing anything else in Disk Utility, choose Show All Devices from the View menu, or from the View popup button in Disk Utility's toolbar.Ĭlick to select the disk that you would like to use as the destination for your CCC task. Unfortunately, this hides the devices that you need to select to modify the partitioning of your backup disk. Watch a longer, in-depth tutorial about using Disk Utility Show All Devicesĭisk Utility offers a very simplified view of your devices by default. Watch a video of this tutorial on YouTube Instructions for Big Sur, Catalina, Mojave, and High Sierra macOS 10.12 Sierra and OS X 10.11 El Capitan.macOS 11Big Sur, 10.15 Catalina, 10.14 Mojave, and 10.13 High Sierra.Choose About This Mac from the Apple menu to determine your current OS, then make a selection below. Updated December 2019: Everything is up to date through macOS Catalina.The remaining steps vary considerably depending on the operating system you are running. If you have any more questions about reinstalling macOS on your Mac, let us know in the comments.

#Mac os x startup disk utility how to

How to set up and customize your Mac from scratch Questions? If you're starting from scratch, you'll need to set up your Mac from scratch. Your Mac will now go through the normal macOS installation process, eventually restarting.

#Mac os x startup disk utility install

Click on the drive on which you wish to install macOS.How to reinstall macOS while in Recovery mode If you're running macOS High Sierra or later on a Mac with an SSD, your choices will be some form of APFS. Click on the format you want to use for your drive.Click on your startup disk in the Disk Utility sidebar.If you want the content on your Mac to stay intact, skip to the next section. If you need to start completely fresh, then you'll want to erase your startup disk using Disk Utility. How to erase your startup disk in macOS Recovery mode First Aid will run, checking the health of your Mac's drive. It should be the drive at the top of the sidebar if there are multiple drives. Click on your Mac's startup drive in the Disk Utility sidebar.Click Disk Utility when in macOS Recovery.You'll need to use Disk Utility to do that. The first thing you'll want to do is make sure your Mac's startup disk is healthy. How to check your startup disk with Disk Utility in macOS Recovery mode Press Shift - Option - Command - R to install the version of macOS that came with your Mac, or the version closest to it that's still available.

#Mac os x startup disk utility upgrade