Disk Utility can find and repair errors related to the formatting and directory structure of a Mac disk. Errors can lead to unexpected behavior when using your Mac, and significant errors might even prevent your Mac from starting up completely.
Explore the world of Mac. Check out MacBook Pro, MacBook Air, iMac, Mac mini, and more. Visit the Apple site to learn, buy, and get support. First, install Toast 5 Titanium if you have Mac OS 8.6 to Mac OS 9.2.2. For Mac OS 8.5 and below (down to Mac OS 7.5.1), install Toast 4. DiskCopy, bundled with late classic Mac OS versions, opens Apple's own distribution disk images such as file names that end with '.img'. It's worth noting that just because you could once mount a.img file.
Before proceeding, make sure that you have a current backup of your Mac, in case you need to recover damaged files or Disk Utility finds errors that it can't repair.
Open Disk Utility
In general, you can just open Disk Utility from the Utilities folder of your Applications folder. However, if your Mac doesn't start up all the way, or you want to repair the disk your Mac starts up from, open Disk Utility from macOS Recovery:
- Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps:
- Apple silicon: Turn on your Mac and continue to press and hold the power button until you see the startup options window. Click the gear icon labeled Options, then click Continue.
- Intel processor: Turn on your Mac, then immediately press and hold these two keys until you see an Apple logo or other image: Command (⌘) and R.
- You may be asked to select a user you know the password for. Select the user, then click Next and enter their administrator password.
- From the utilities window in macOS Recovery, select Disk Utility and click Continue.
Select your disk in Disk Utility
Choose View > Show All Devices (if available) from the menu bar or toolbar in Disk Utility.
The sidebar in Disk Utility should now show each available disk or other storage device, beginning with your startup disk. And beneath each disk you should see any containers and volumes on that disk. Don't see your disk?
In this example, the startup disk (APPLE HDD) has one container and two volumes (Macintosh HD, Macintosh HD - Data). Your disk might not have a container, and it might have a different number of volumes.
Repair volumes, then containers, then disks
For each disk that you're repairing, start by selecting the last volume on that disk, then click the First Aid button or tab.
In this example, the last volume on the disk is Macintosh HD - Data.
Click Run to begin checking the selected volume for errors.
- If there is no Run button, click the Repair Disk button instead.
- If the button is dimmed and you can't click it, skip this step for the disk, container, or volume you selected.
- If you're asked for a password to unlock the disk, enter your administrator password.
Theplayhouse mac os. After Disk Utility is done checking the volume, select the next item above it in the sidebar, then run First Aid again. Keep moving up the list, running First Aid for each volume on the disk, then each container on the disk, then finally the disk itself.
In this example, the repair order is Macintosh HD - Data, then Macintosh HD, then Container disk3, then APPLE HDD.
If Disk Utility found errors that it can't repair
If Disk Utility found errors that it could not repair, use Disk Utility to erase (format) your disk.
If your disk doesn't appear in Disk Utility
If Disk Utility can't see your disk, it also can't see any containers or volumes on that disk. In that case, follow these steps:
- Shut down your Mac, then unplug all nonessential devices from your Mac.
- If you're repairing an external drive, make sure that it's connected directly to your Mac using a cable that you know is good. Then turn the drive off and back on.
- If your disk still doesn't appear in Disk Utility, your Mac might need service. If you need help, please contact Apple Support.
Controls tenant-wide options and restrictions specific to syncing files.
Syntax
Description
This cmdlet contains more than one parameter set. You may only use parameters from one parameter set, and you may not combine parameters from different parameter sets. For more information about how to use parameter sets, see Cmdlet Parameter Sets.
You must be a SharePoint Online administrator or Global Administrator to run the cmdlet.
Requires a valid Connect-SPOService context to identify the tenant. For information on how to connect to the tenant, see Connect-SPOService
The Set-SPOTenantSyncClientRestriction cmdlet is used to control a variety of tenant-wide administrative settings related to syncing files from OneDrive and SharePoint. You may use it to:
Set restrictions on whether users can sync items to non-domain joined machines, control the list of allowed domains, and manage whether Mac clients (which do not support domain join) can sync.
Prevents files with specific extensions from being synced.
Witch maker mac os. Controls whether users can continue to sync OneDrive for Business libraries with the old OneDrive for Business sync client. Alklaku fantomojn! mac os.
Restrict non-domain joined machines from syncing
The Set-SPOTenantSyncClientRestriction cmdlet can be used to enable the feature for tenancy and set the domain GUIDs in the safe recipients list. When this feature is enabled it can take up to 24 hours for the change to take effect. However, any changes to the safe domains list are reflected within five minutes.
The Set-SPOTenantSyncClientRestriction cmdlet applies both to existing Microsoft OneDrive for Business sync client (Groove.exe) and the Microsoft OneDrive for Business Next Generation Sync Client (OneDrive.exe). OneDrive.exe is the new sync client that will sync both consumer and business accounts.
Important
The new OneDrive for Business Next Generation Sync Client lets you connect and sync files from your OneDrive for Business. You can add a work or school account to the new OneDrive for Business sync client and sync all your files in OneDrive to your computer. For more information, see Improve your OneDrive sync experience.
When the feature is enabled the following will occur:
All OneDrive for Business Sync client requests originating from a domain that is not on the safe recipients list will be blocked.
All Microsoft OneDrive Mac Sync client and Mac Beta client requests will not be blocked by default.
Microsoft OneDrive mobile apps are not blocked when this feature is enabled.
Regardless whether a computer is managed by a device management solution, a sync relationship will not be established unless they are joined to a domain in the Safe Recipient List.
Any files that have been previously been synced down to your computer will not be deleted.
When this feature is enabled, please be aware the following upload behavior:
- New or existing files added to the client will still be uploaded to the server and will not be blocked.
- Regardless if the computer is joined to a domain which is set in the Safe Recipient List.
- Regardless if the computer is joined to a domain which is not set in the Safe Recipient List.
- And for all non-domain joined computers.
Microsoft OneDrive for Business sync client prior to version 15.0.4693.1000 will stop syncing existing libraries.
Important
In order to explicitly block Microsoft OneDrive client for Mac or OneDrive for Business Next Generation Sync Client on Mac OS X, please run the Set-SPOTenantSyncClientRestriction cmdlet with the BlockMacSync parameter set to true. For more information about the Next Generation Sync Client for Mac OS X, see Get started with the new OneDrive sync client on Mac OS X.
Important
There is a known OneDrive for Business sync client issue where syncing is being blocked even if a computer is joined to a domain which is set in the Safe Recipient List. To resolve this behavior, obtain the 15.0.4719.1000 version or higher of the sync client, see May 12, 2015, update for OneDrive for Business.
Note
To determine the version of your Sync client, see What version of the sync client am I using?.
- The latest OneDrive for Business sync client can be downloaded from Download OneDrive for Windows or How to install OneDrive for Business for SharePoint and SharePoint Online.
Important
This capability doesn't support Microsoft Azure Active Directory (AD) Joined or Workplace Joined devices.
For additional information about how to troubleshoot the OneDrive for Business sync client, see How to switch from an MSI installation of OneDrive for Business (formerly SkyDrive Pro) standalone to a Click-To-Run installation of OneDrive for Business (formerly SkyDrive Pro) standalone.
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Block specific file extensions from syncing
The Set-SPOTenantSyncClientRestriction cmdlet can be used to configure a list of file extensions that should not be synced by the OneDrive sync client, such as .PST files.
Any file extension may be blocked using this feature, but note that it may take up to 24 hours for a change to take affect across all user devices. When this feature is enabled, users syncing any file that is in the exclusion list will see an error message informing them of the block.
Important
This feature is only supported by the new OneDrive for Business sync client. To determine the version of your Sync client, see What version of the sync client am I using?.
Control whether users can use the old OneDrive for Business sync client
The Set-SPOTenantSyncClientRestriction cmdlet can be used to configure your tenant to allow or disallow users from using the old OneDrive for Business sync client to sync OneDrive for Business libraries.
This feature is controlled on an opt-out model which lets users to continue syncing with the old sync client, you may choose to opt out of the Groove block.
When this feature is enabled, the old OneDrive for Business sync client will stop syncing the user's OneDrive contents. OneDrive for Business users who are still using the old OneDrive for Business sync client will see an error message and will be prompted to launch and configure the new OneDrive for Business sync client. If they do not yet have the new client installed, they will have the opportunity to download and install it.
If you opt out, users will be able to resume syncing with the old OneDrive for Business Sync client.Note that it may take up to an hour for this change to be reflected.
Note
This feature only applies to syncing a user's own OneDrive for Business sites. Team Sites and shared content from other people's OneDrive for Business sites will continue to sync with the old OneDrive for Business sync client.
Examples
--------------------EXAMPLE 1---------------------
This example enables the feature for the tenancy and adds the domains GUIDs to the safe recipient list.
--------------------EXAMPLE 2------------------
This example turns on the Block Mac sync functionality.
--------------------EXAMPLE 3------------------
This example blocks syncing of PowerPoint, Word, and Excel file types using the new sync client (OneDrive.exe).
--------------------EXAMPLE 4------------------
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This example clears the ExcludedFileExtension list and lets all file types synced with the new client (OneDrive.exe).
--------------------EXAMPLE 5------------------
This example allows users in a tenant to continue syncing OneDrive for Business libraries with the old OneDrive for Business sync client.
--------------------EXAMPLE 6------------------
This example blocks users in a tenant from syncing OneDrive for Business libraries using the old OneDrive for Business sync client. Users will be prompted to upgrade to the new client.
Parameters
Block Mac sync clients-- the Beta version and the new sync client (OneDrive.exe).The values for this parameter are True and False. The default value is False.
Type: | SwitchParameter |
Position: | Named |
Default value: | None |
Accept pipeline input: | False |
Accept wildcard characters: | False |
Applies to: | SharePoint Online |
Type: | Boolean |
Position: | Named |
Default value: | None |
Accept pipeline input: | False |
Accept wildcard characters: | False |
Applies to: | SharePoint Online |
Sets the domain GUID to add to the safe recipient list. Requires a minimum of 1 domain GUID. The maximum number of domain GUIDs allowed are 125.
Type: | String |
Position: | Named |
Default value: | None |
Accept pipeline input: | False |
Accept wildcard characters: | False |
Applies to: | SharePoint Online |
Enables the feature to block sync originating from domains that are not present in the safe recipients list.
Type: | SwitchParameter |
Position: | Named |
Default value: | None |
Accept pipeline input: | False |
Accept wildcard characters: | False |
Applies to: | SharePoint Online |
Blocks certain file types from syncing with the new sync client (OneDrive.exe).
Note
It may take up to one hour for changes to take effect.
Type: | String |
Position: | Named |
Default value: | None |
Accept pipeline input: | False |
Accept wildcard characters: | False |
Applies to: | SharePoint Online |
Controls whether or not a tenant's users can sync OneDrive for Business libraries with the old OneDrive for Business sync client.The valid values are OptOut, HardOptin, and SoftOptin.
Note
GrooveBlockOptions is planned to be deprecated. Please refrain from using the parameter.
Type: | String |
Accepted values: | OptOut, HardOptIn, SoftOptIn |
Position: | Named |
Default value: | None |
Accept pipeline input: | False |
Accept wildcard characters: | False |
Applies to: | SharePoint Online |
Inputs
None
Outputs
System.Object