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But OS X Mountain Lion is sold in the App Store as a digital download - no physical disk is provided. With previous versions of OS X, you could have used the installation DVD to fix problems. An emergency drive (also referred to as an OS X Recovery Disk) can help you repair the hard disk, reinstall the operating system, and restore from a Time Machine backup to get your computer back fast. It’s a good idea to have a bootable emergency drive on hand, just in case disaster strikes your Mac.
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This way both tools are available in one convenient place whenever you need them.AirPort Apple Apps Backups Developer Education Email Hardware Internet iPad iPhone Mac Music Network Photos Security TV Weekend Wonk For example, Alsoft’s DiskWarrior is an invaluable tool that goes above and beyond what OS X’s own Disk Utility has to offer.
Rescue kit for mac os x iso install#
Once you’re in, run Software Update a few times to get the latest patches and install any third party diagnostic utilities you may have. Set up the fresh installation just like you would a new computer.This is how you will access it in the future, too. If it doesn’t, restart the Mac manually and hold down the Option key to choose the drive yourself.
Eventually, the installation will finish and it should reboot directly to the USB drive. When all is said and done, you should find about 9GB of your 16GB drive has been filled. The rest of the process should be automated and might take between 30-60 minutes since USB flash drives are slower than internal hard drives. Un-check all of the items except “Essential System Software.” You may choose to check “Rosetta” and “QuickTime 7” since they are so small and might come in handy. Click on the Customize button and a new window will appear. Click the Show All Disks button and select your USB flash drive. Double-click the “Install Mac OS X” icon and progress through the installer until you get to the screen that says “Mac OS X will be install on…” 
A window should pop up with the contents of the disc.
Insert your Mac OS X installation disc if you haven’t already. Go to the Erase tab, make sure the Format is “Mac OS Extended (Journaled),” and click the Erase button. Click on the volume name you entered in Step 3 (in the list under the flash drive’s name). I don’t believe this step is required, but it makes me feel better and doesn’t hurt. Disk Utility will take a minute or two to complete the task. Now that all of the settings have been chosen, click the Apply button and then Partition. Click on the Options button towards the bottom and choose “GUID Partition Table” from the popup window. Enter a name for the volume (I called mine “OS X USB”), select “Mac OS Extended (Journaled)” as the Format, and make sure the size is somewhere around 15-16GB. Go to the Partition tab and select “1 Partition” from the Volume Scheme menu. Open Disk Utility (Applications > Utilities) and click on your flash drive in the list on the left. Make sure there’s no valuable data on there because it will be permanently wiped out in a couple minutes. To start things off, connect the USB flash drive to your Mac. And the third thing you’ll need to get the job done is your OS X installation DVD. While they should be fine, squeeze those versions of Mac OS X on a 16GB drive at your own risk. Keep in mind 10.6 Snow Leopard was used to demonstrate this tutorial, so I’m not sure how much space 10.5, 10.4, and earlier require. Second, at least a 16GB USB flash drive, such as this SanDisk Cruzer Micro for about $30 at Amazon. First you’ll need an Intel-based Mac from the past few years. Rescue kit for mac os x iso how to#
Now that you’re convinced, let’s figure out how to do this.
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