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Mac os x startup disk is full update#
Mac os x startup disk is full software#
Mac os x startup disk is full password#
Mac os x startup disk is full mac#

Or click Startup Disk and choose a different startup disk, which your Mac will also attempt to verify.

Mac os x startup disk is full update#

Click Update to open the macOS installer, which you can use to reinstall macOS on the startup disk.

Mac os x startup disk is full software#

macOS: An alert informs you that a software update is required to use this startup disk.

Enter your administrator password, then click Unlock to complete the download.

Mac os x startup disk is full password#

If FileVault is enabled while your Mac is attempting to download updated integrity information, you're asked to enter a password to unlock the disk. This information is unique to your Mac, and it ensures that your Mac starts up from an OS that is trusted by Apple. If the OS is unknown or can't be verified as legitimate, your Mac connects to Apple to download the updated integrity information it needs to verify the OS. This is a level of security previously available only on iOS devices.ĭuring startup, your Mac verifies the integrity of the operating system (OS) on your startup disk to make sure that it's legitimate. If you're using Boot Camp to start up from Microsoft Windows, set Startup Disk preferences to start up from macOS instead. Then shut down or restart and try again.Full Security is the default setting, offering the highest level of security.If you're using a keyboard made for a PC, such as a keyboard with a Windows logo, try a keyboard made for Mac. Or use your built-in keyboard or a wired keyboard. If you're using a wireless keyboard, plug it into your Mac, if possible.Some keyboards have a light that flashes briefly at startup, indicating that the keyboard is recognized and ready for use. You might need to wait a few seconds before pressing the keys, to give your Mac more time to recognize the keyboard as it starts up. Then press and hold the keys as your Mac starts up. Then press the power button to turn on your Mac. Press and hold all keys in the combination together, not one at a time.If a key combination doesn't work at startup, one of these solutions might help: Eject (⏏) or F12 or mouse button or trackpad button: Eject removable media, such as an optical disc. Disabled when using a firmware password.Command-V: Start up in verbose mode. Disabled when using a firmware password.T: Start up in target disk mode. Disabled when using a firmware password.Disabled in macOS Mojave or later, or when using a firmware password. Command-S: Start up in single-user mode.To use the default boot image on the server, press and hold Option-N instead. Disabled when using a firmware password. N: Start up from a NetBoot server, if your Mac supports network startup volumes.Or use Option-D to start up to this utility over the internet. Disabled when using a firmware password. D: Start up to the Apple Diagnostics utility.

If your Mac is using a firmware password, it ignores this key combination or starts up from macOS Recovery.

Option-Command-P-R: Reset NVRAM or PRAM.

If your Mac is using a firmware password, you're prompted to enter the password.

Option (⌥) or Alt: Start up to Startup Manager, which allows you to choose other available startup disks or volumes.

macOS Recovery installs different versions of macOS, depending on the key combination you use. If your Mac is using a firmware password, you're prompted to enter the password. Or use Option-Command-R or Shift-Option-Command-R to start up from macOS Recovery over the internet.

Command (⌘)-R: Start up from the built-in macOS Recovery system.

Keep holding until the described behavior occurs. To use any of these key combinations, press and hold the keys immediately after pressing the power button to turn on your Mac, or after your Mac begins to restart.