An important application in your maintenance toolbox is the Disk Utility, which is located in the Utilities folder within your Applications folder. When you first run this program, it looks something like Figure 1, displaying all the physical disks and volumes on your system.

Figure 1: The familiar face of Tiger’s Disk Utility.

Aug 01, 2012  Mac. MacBook Pro 13' MD101. เคยทำก็ไม่มีวิธีแก้ นอกจากลงใหม่ครับ Repair Disk ไม่หายครับ. งานด้วย ครับ ถ้าหนักมาก เครื่อง ก็จะแย่ เอา Bootcamp ดี กว่า ครับ. Do you need a third-party disk utility? You also needed at least one third-party disk repair utility on hand to solve the problems Disk Utility couldn’t. A safe boot (starting your Mac. According to most Mac users, it seems that it's no longer a new problem to change and upgrade Mac boot drive. However, it's still a tough task and most Mac users are not quite familiar with Mac boot drive upgrade. And sometimes, those Mac users may not even be able to boot Mac properly after changing the boot drive to a new disk.

The Disk Utility application has its own toolbar that you can toggle on and off. Click the lozenge-shaped button at the upper-right corner of the window to display or hide the toolbar.

Displaying the goods on your disks

The volume tree structure on the left of the Disk Utility window lists both the physical disks and the partitions that you’ve set up. A partition is nothing more than another word for volume, which is the formatted section of a disk that contains data. A single physical hard drive can contain several partitions. The information display at the bottom of the Disk Utility window contains data about both the volumes and the partitions on your hard drive.

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In Mac there are several errors which is difficult to cumbersome whenever they encounter and “Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.”. Apr 06, 2006 Well. I managed last night to get Boot Camp to partition my HD but it has also corrupted by OSX partition so now I cant boot OSX. Disk utility can't repair the drive nor can running 'fsck' in single-user mode. I am also having trouble installing XP, can't read my CD properly for some reason.

How to make voice crack in auto tune. To illustrate: Clicking a drive labeled at the top of the tree displays a description of the drive itself, including its total capacity, interface (connection type), and whether the drive is internal or external, as shown in Figure 2.

Figure 2: Display data on a physical drive.

Clicking the tree entry for a partition, however, displays information about the type of formatting, the total capacity of the partition and how much of that is used, and the number of files and folders stored on the partition (see Figure 3).

Figure 3: Display data on a volume.

Playing doctor with First Aid

From the First Aid pane, Disk Utility can be used to verify (or check) any disk (well, almost any disk) for errors, as well as repair any errors that it finds. Here are the two exceptions when the buttons are disabled:

• The start-up disk: Disk Utility can’t verify or repair the start-up disk — that’s Mac talk for the boot drive that contains the Mac OS X system that you’re using at the moment — which makes sense if you think about it because that drive is currently being used!

If you have multiple operating systems on multiple disks, you can boot from another Mac OS X installation on another drive to check your current start-up disk. Or, you can boot your system from the original Mac OS X installation CD and run Disk Utility from the Installation menu.

Your start-up disk is automatically verified and repaired (if necessary) during the boot procedure, so you really don’t need to worry about checking the start-up disk.

• Write-protected disks: Although you can use the Disk Utility to verify CDs, DVDs, and write-protected removable disk drives (like a write-protected Zip disk), it can’t repair them.

You also can’t repair a disk that has open files that are currently being used. If you’re running an application from a drive or you’ve opened a document that’s stored on that drive, you won’t be able to repair that drive.

You can also elect to verify and repair permissions (also called privileges) on a disk; these are the read/write. If you can’t save or move a file that you should be able to access, check that drive for permissions problems. Unlike fixing disk errors, you can verify and repair permissions on any volume that contains a Mac OS X installation (whether it was used to boot your Mac or not).

In order to verify or repair, you must be logged in as an admin-level user.

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To verify or repair a drive, first select the target volume/partition in the list at the left. To check the contents of the drive and display any errors, click the Verify Disk button. Or, to verify the contents of the drive and fix any problems, click the Repair Disk button. Disk Utility displays any status or error messages in the scrolling list; if you’ve got eagle eyes, you’ll note that the window can be resized so that you can expand it to display more messages. (You can also drag the dot between the left and right panes to expand the list.)

Check your disks once every two or three days. If your Mac is caught by a power failure or Mac OS X locks up, however, it’s a good idea to immediately check disks after you restart your Mac. (Don’t forget that the start-up volume is automatically checked and repaired, if necessary.)

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. Keep holding until the described behavior occurs.

• Command (⌘)-R: Start up from the built-in macOS Recovery system. Or use Option-Command-R or Shift-Option-Command-R to start up from macOS Recovery over the Internet. macOS Recovery installs different versions of macOS, depending on the key combination you use while starting up. 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. If your Mac is using a firmware password, you're prompted to enter the password.
  
• Option-Command-P-R:Reset NVRAM or PRAM. If your Mac is using a firmware password, it ignores this key combination or starts up from macOS Recovery.
• Shift (⇧): Start up in safe mode. Disabled when using a firmware password.
• D: Start up to the Apple Diagnostics utility. Or use Option-Dto start up to this utility over the Internet. Disabled when using a firmware password.
• N: Start up from a NetBoot server, if your Mac supports network startup volumes. To use the default boot image on the server, hold down Option-N instead. Disabled when using a firmware password.
• Command-S: Start up in single-user mode. Disabled in macOS Mojave or later, or when using a firmware password.
• T: Start up in target disk mode. Disabled when using a firmware password.
• Command-V: Start up in verbose mode. Disabled when using a firmware password.
• Eject (⏏) or F12 or mouse button or trackpad button: Eject removable media, such as an optical disc. Disabled when using a firmware password.

If a key combination doesn't work

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Play overwatch on mac boot camp. If a key combination doesn't work at startup, one of these these solutions might help:

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• Be sure to press and hold all keys in the combination together, not one at a time.
• Shut down your Mac. Then press the power button to turn on your Mac. Then press and hold the keys as your Mac starts up.
• Wait a few seconds before pressing the keys, to give your Mac more time to recognize the keyboard as it starts up. Some keyboards have a light that flashes briefly at startup, indicating that the keyboard is recognized and ready for use.
• If you're using a wireless keyboard, plug it into your Mac, if possible. Or use your built-in keyboard or a wired keyboard. If you're using a keyboard made for a PC, such as a keyboard with a Windows logo, try a keyboard made for Mac.
• 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.

Remember that some key combinations are disabled when your Mac is using a firmware password.

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Learn more

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• Learn what to do if your Mac doesn't turn on.
• Learn about Mac keyboard shortcuts that you can use after your Mac has started up.