Apr 14, 2015 OS X 10. 7 Lion did away with recovery disks, and these days, Apple provides a built-in recovery system within Yosemite. Start your Mac and hold Command + R to go into recovery mode, from which. DVD DL, Mac OS X 10.10 Yosemite Full OS Install, Reinstall, Recovery and Upgrade Supported Models: iMac: Late 2007 or later, MacBook: Aluminum Late 2008, MacBook: Early 2009 or later, MacBook Pro: 13-inch - Mid 2009 or later, MacBook Pro: 15-inch - Mid/Late 2007 or later, MacBook Pro: 17-inch - Late 2007 or later, MacBook Air: Late 2008 or later, Mac Mini: Early 2009 or later, Mac Pro: Early. Mac Pro introduced in early 2008 or later Xserve models introduced in early 2009. To find your Mac model, memory, storage space, and macOS version, choose About This Mac from the Apple menu. If your Mac isn't compatible with OS X Yosemite, the installer will let you know. To create an OS X Recovery Disk, make sure that your machine is at least running on OS X Lion or Mountain Lion and that there is an existing Recovery System on its startup volume. If you have a newer Mac, use Internet Recovery to get the system online. How to reinstall OS X Yosemite. Click on Reinstall OS X in the OS X Utilities selector. Click Continue on the OS X Yosemite Installer. From this point on it's the same as a standard update, simply continue on and agree to the licensing terms as you go. When you're done, your Mac will reboot into OS X Yosemite.
Author's Note:Stellar Volume Repair has been discontinued. Please check Stellar Data Recovery Premium for Mac to Recover & Repair Data. |
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If your Mac feels too tired to give the performance you're expecting it to and you've tried everything you could think of to pull it up, drive verify and repair could be the solution for you. However, don't go rushing to this solution every time you're too lazy to find out the actual cause of the problem.
You should think of verifying and repairing Yosemite drive under the following circumstances:
- Some data on your Mac has mysteriously gone missing
- You've noticed a drastic downfall in Mac's performance post a power cut
- General Mac maintenance
One of the main reasons behind an unexpected performance degrade of your Mac could be its inability to locate the data on the drive. All your Mac data is stored in a directory on the drive and the OS, when required, refers this drive. If the data or the locating mechanism or something else goes wrong here, your Mac may have a tough time finding what you're looking for. This causes the delay in operation and sluggish behavior.
Repairing Yosemite Drive using Mac utilities
Apple is known for being intuitive. They know their users could face such problems and hence they've made provisions beforehand to tackle such issues. Two brilliant inbuilt utilities, which you could use, are Repair Disk Permissions and Repair Disk. These are part of the Disk Utility provided within Mac.
But before you try any of these alternatives, make sure you backup your important data. Disk Repair could mean rewinding your Mac to an earlier date or could have any other side effect and you wouldn't want to face data loss at the end. Now that we've got that out of the way, let's go over these utilities one by one.
Repair Disk Permissions
It's ironical that something, which is designed to avoid letting your Mac run into problems, could itself be the source of its problem. But it's true! Believe it or not, disk permissions could sometimes be the reason behind your Mac's troubles. Repair Disk Permissions verifies and repairs permissions related to various Apple apps and other programs on your Mac. It makes sure all permissions are the way they should be. Now you would think, why would the permissions be different from what they should be?
Many third-party apps or software make temporary changes to System permissions while being installed. But when they try to revert them to their original form after the installation, sometimes they fail. This causes a permanent change in the permissions, which could interfere with the normal working of your Mac, which in turn could affect performance. So the first thing to try out in case of a problem is to repair disk permissions. Here are the steps to do so:
- Restart your Mac and hold down Command + R keys to launch the inbuilt Disk Utility.
- You will see a list at the left of the utility window that opens. Select your Mac in it.
- At the bottom left of the window, you will see a First Aid pane. In this pane there'll be 2 commands – ‘Verify Disk Permissions‘ and ‘Repair Disk Permissions‘.
- Select ‘Repair Disk Permissions'. (It is recommended not to select both options since the Repair Disk Permissions command runs Verify Disk automatically, so selecting both will mean repetitive operation)
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To Repair Disk, here are the steps:
- Restart your Mac and hold down Command + R keys to launch the inbuilt Disk Utility.
- You will see a list at the left of the utility window that opens. Select your Mac in it.
- Select ‘RepairDisk' located to the right of ‘Repair Disk Permissions'.
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Both the above options make the Disk Utility application try to attempt to identify problems with your Mac and repair them. Restart your Mac after running these options to check for improvements. If there are no major ones, you could even try restarting your Mac in safe mode. If disk utility can't repair this disk, then free download Stellar Volume Repair on your Yosemite. This software scans your startup disk to verify & repair severely damaged disk permissions. You can also repair your corrupt directory structure with the help of the registered version of Stellar Volume Repair. Apple web browser for windows 7.
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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If a key combination doesn't work at startup, one of these these solutions might help:
- 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.
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Remember that some key combinations are disabled when your Mac is using a firmware password.
Learn more
Macbook Pro Recovery Mode
- 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.