If you don't hold the Option key, then your Mac will boot to whatever you have set as a default. Choose a different OS by holding the option key at boot, and you already know about that. If you normally want to use OS X, then set that as the default in Startup Disk. You can always change that, if you prefer. Set your default booting OS in your System Preferences/Startup Disk pref pane. (see screenshot below) 3 Expand open the disk (ex: 'Disk 2') that. 2 Click/tap on Storage on the left side, and click/tap on the Manage Disks and Volumes link on the right side. 1 Open Settings, and click/tap on the System icon. This option is only available starting with Windows 10 build 20197. If you have multiple boots, the option key is the quickest way to choose which OS you want at startup. Delete Volume or Partition on Disk in Settings. If you are still using Tiger (OS X 10.4.x), that Boot Camp version has expired, so you would need to be upgraded to Leopard (OS X 10.5) to use Boot Camp. Continue with that, and you should be OK.Īfter installing OS X, you will be able to reinstall Windows using Boot Camp if you need to do that. You will return to the OS X install screen. When that completes (should only take a few seconds), then Quit that Disk Utility. Name your new drive, if you want to, and click the Erase button. The first screen is to choose a language, then at the next screen, open Disk Utility from the menu (probably the Utilities menu)Ĭlick on your new hard drive to select it, then click the Erase tab. Insert your installer disk in the drive, and restart to that disk holding the letter C. You have to format (erase) your new hard drive before you can install OS X.
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