In boot option menu select installation flash drive and wait till the OS X Utilities starts. Hold the Alt (option) key, press the power button. Replace the hard drive in your Mac, the old disk put in the USB HDD rack and Connect it to the USB port as well as installation flash drive. It is recommend to create installation USB. How to create Mac OS X Lion installation DVD that deal with this topic. How to create Mac OS X Lion installation USB flash disk and If you don't know how, you can check one of our other articles:
How to clone Mac hard drive with Disk UtilityĪt first create a bootable Mac OS X installation medium. How to clone Mac hard drive hard with Carbon Copy Cloner.How to clone Mac hard drive with Disk Utility.For cloning the disk you can use Disk Utility that is a part of Mac OS X and OS X Utilities, or third-party software, like Carbon Copy Cloner. If the system on your old hard drive is working without any problems, you can save your time and clone the old disk with all of your data to new one with a few steps. It's better to perform a clean installation so your system does not have some old file garbage, but you will need to spend more time with the installation of your other software and restoring of backup of your documents, photos, music and other data back to your Mac. Whenever you want to replace hard drive by a new one, or change it to SSD in your MacBook Pro (as well as in other types of Mac computers), you will also need to re-install the Mac OS X on the new drive.
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