Select a startup disk in OS X Accessing the boot menu in OS X is a simple key press, though in some cases it requires specific timing in order to work.

Click on the OK button. Next, select Disk 0 partition 2, where you had planned to install Windows. Delete this was well after confirmation.

Select the hard disk for which you face this problem. For example, if the disk number is 0, then execute select disk 0 command Now the disk is selected, execute the clean command to wipe it ...

Disk 1 = 750 7200rpm (C boot, system, primary partition. I'm thinking of adding a SSD as a boot drive with a fresh install and a 2TB green. Here's my question. How does Disk 0, Disk 1, etc. matter ...