1. Macbook Pro Disk Utility Startup
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3. Disk First Aid Download
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6. Create Macbook Pro Startup Disk

Within the Disk Utility program, First Aid is a functionfor checking and repairing file system errors.

Disk First Aid was the name of a disk repair utility that was included or available for download with Mac OS 9.x or earlier. Disk First Aid was able to analyze and repair basic hard drive problems. Disk First Aid was not a full-featured disk repair tool. It concentrated on just the basics: repairing catalogs, extends, and volume bit maps. Check Apple Server Status. The primary thing to ensure is that everything is running smoothly from. Running First Aid on the “Mac” disk (including previous container and volumes) reports: The partition map appears to be OK Operation successful. Shutting down the Mac and cold booting in macOS Recovery (Command R while booting) and selecting Disk Utility and “Mac Disk – Data” and First Aid reports.

Click the partition on which your operating system is installed - in this case it's called Mac OS X - and, under the First Aid tab, click Repair Disk Permissions. Mac Disk Utility; Disk First Aid Mac; Disk Repair For Mac Osx; Disk Repair For Mac Os 10.13; macOS Recovery is part of the built-in recovery system of your Mac. Download System 9.2.2 No Wait Patch for Mac to shortens Disk First Aid dialog wait.

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When to use First Aid

If your computer is crashing frequently, displaying cryptic errormessages, or exhibiting unusual behavior, you can use First Aid as afirst step to check for defects and, in many cases, repair them. If,however, your volume has suffered severe corruption, you may need touse other utility programs or repair methods.

Even if you are not getting errors, it is a good idea to run First Aidperiodically. This preventive maintenance can help keep smallproblems from developing into bigger ones.

Using First Aid

Note: For help with correcting permissions problemsrather than file system errors, see ARCHIVED: Using Mac OS X, how do I repair permissions, and what does that do?

To check your startup disk, run First Aid from your softwareinstallation DVD:

1. Insert the DVD, and then restart your computer. To force yourcomputer to boot from the DVD, hold down thec key.
2. Follow the instructions on the screen, and when the menu barappears, from the Utilities (Mac OS X 10.5 andlater) or Disk Utilities (Mac OS X 10.4) menu, selectDisk Utility.
3. In the column on the left, select the volume you want to repair,and then on the right, click the First Aid tab. You canselect multiple volumes by holding down theCommand key while clicking the volumes.
4. To begin a verification process (a simple check for errors), clickVerify Disk. To verify and repair any problems on the selected volume(s), click Repair Disk. You can stop the scan at any time byclicking Stop Verify or Stop Repair.

Results

The results of a verification and/or repair will be posted in thewindow. Run First Aid repeatedly until you see thefollowing message at the end of the scan, where disknameis the name of your disk:

The volume 'diskname' appears to be OK.

Note: Some volumes can be verified but not repaired(e.g., the startup disk, the volume where Disk Utility resides, awrite-protected disk such as a DVD-ROM, or a disk that has openfiles). First Aid will warn you if one of these conditions exists whenyou select a volume.

Handling problems First Aid cannot repair

Occasionally, at the end of a scan, a message similar to the followingwill appear:

'Scan complete. Problems were found, but Disk First Aid cannot repairthem.'

This indicates that some of your files may be more severely damaged.To repair this damage, you can either back up your disk and reformat,or obtain a more comprehensive disk repair program. Two such programsare DiskWarrior from Alsoft, andTechTool Pro from Micromat ComputerSystems.

Disk Utility User Guide

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Disk Utility can check for and fix errors related to the formatting and directory structure of a Mac storage device.

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Disk Utility can fix certain disk problems—for example, multiple apps quit unexpectedly, a file is corrupted, an external device doesn’t work properly, or your computer won’t start up. Disk Utility can’t detect or repair all problems that a disk may have.

To check and repair a disk, you need to run First Aid on each volume and container on the storage device in turn, then run it on the storage device itself.

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If Disk Utility tells you the disk is about to fail, back up your data and replace the disk—you can’t repair it.

1. In the Disk Utility app on your Mac, choose View > Show All Devices.

   If Disk Utility isn’t open, click the Launchpad icon in the Dock, type Disk Utility in the Search field, then click the Disk Utility icon .

   Note: If you’re checking your startup disk or startup volume, restart your computer in macOS Recovery, select Disk Utility in the macOS Recovery window, then click Continue. If you check your startup volume (Macintosh HD), make sure you also check your data volume (Macintosh HD - Data).

2. In the sidebar, select a volume, then click the First Aid button .

3. In the First Aid dialog, click Run, then follow the onscreen instructions.

4. When the First Aid process is complete, click Done.

5. Repeat steps 2 through 4 for each volume on the storage device.

6. In the sidebar, select a container, then click the First Aid button .

7. In the First Aid dialog, click Run, then follow the onscreen instructions.

8. When the First Aid process is complete, click Done.

9. Repeat steps 6 through 8 for each container on the storage device.

10. In the sidebar, select the storage device, then click the First Aid button .

11. In the First Aid dialog, click Run, then follow the onscreen instructions.

12. When the First Aid process is complete, click Done.

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If Disk Utility reports that the disk appears to be OK or has been repaired, you’re done. You can click Show Details to see more information about the repairs. Otherwise, you may need to do one of the following.

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• If Disk Utility reports “overlapped extent allocation” errors, two or more files occupy the same space on your disk, and at least one of them is likely to be corrupted. You need to check each file in the list of affected files. Most of the files in the list have aliases in a DamagedFiles folder at the top level of your disk.

  • If you can replace a file or re-create it, delete it.

  • If it contains information you need, open it and examine its data to make sure it hasn’t been corrupted.

• If Disk Utility can’t repair your disk, or you receive a report that the First Aid process failed, try to repair the disk or partition again. If that doesn’t work, back up as much of your data as possible, reformat the disk, reinstall macOS, then restore your backed-up data.

If your Mac has a Fusion Drive and you see a flashing question mark or alert, see the troubleshooting section of the Apple Support article About Fusion Drive, a storage option for some Mac computers.

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If you continue to have problems with your disk or it can’t be repaired, it may be physically damaged and need to be replaced. For information about servicing your Mac, see Find out how to service or repair your Mac.