Otherwise, call a friend who also owns a Mac and ask nicely to use theirs to make the bootable USB stick. Although you can change the startup disk from the System Preferences window in Mac OS X 10.9 Mavericks, there are times when you may need to change it from the Terminal. If your current OS installation is still functioning, you should be able to get there. Next, you’re going to head on over to the Mac App Store on a Mac laptop or computer. MacDisk is a 32-bit application and runs under all recent versions of Windows (Vista and 7/8/10 included, even 64 bits). Now, click on the “Erase” button and the Disk Utility will prepare the USB stick for the next steps you’re going to follow.ĭisk Utility will let you know when it’s completed the task once it’s finished, close Disk Utility. MacDisk is an utility for reading, writing and formatting Apple Macintosh magnetic media on an IBM compatible PC, without any hardware modification of the computer and without any add-on.Leave the USB stick named as “Untitled.” Make the format “Mac OS extended (Journaled)” and use “GUID Partition Map” as your scheme.Click on your USB stick, then select “Erase.”.Once you open Disk Utility, you’ll see your USB drive listed. Select your OS X volume, and click Repair. Click the triangle to the left of the hard drive icon to display a list of your disk volumes and partitions. (Do not click Continue in the first screen of the installer, or you’ll have to start up from the disc all over again to access Disk Utility.) Once in Disk Utility, either from an installation disc or in the Recovery System, proceed to the First Aid tab. Your Mac will search for problems and fix any that. Choose Disk Utility from the Installer menu. To do this, go to Spotlight (magnifying glass in the toolbar), search for Disk Utility, and click on Disk Utility.app. You’ll have to prepare it by going to Applications > Utilities > Disk Utility. Can I repair my Mac hard disks without using fsck Yes, you can also use Disk Utility to repair a hard drive on your Mac. Make sure you have what you need from it, because you’re going to erase it and make it Mac compatible. Before you do anything with the USB stick, it must be 8GB in size or larger.

Access disk utility on mac startup