Choose Reinstall macOS (or Reinstall OS X) from the Utilities window. Click Continue, then follow the onscreen instructions to choose your disk and begin installation. If the installer asks to unlock your disk, enter the password you use to log in to your Mac. Set the format type to Mac OS Extended (Journaled.) Optionally, click on. The Security button and set the ZeroData option to one-pass. The Erase button and wait until the process has completed. Quit DU and return to the main menu. Reinstall Lion: Select Reinstall Lion/Mountain Lion and click on the Install button. IMac Intel 27' EMC 2309 & 2374. IMac Intel 27' EMC 2309 (Late 2009, Core 2 Duo 3.06 or 3.33 GHz) ID iMac10,1, EMC 2374 (Late 2009, Core i5 2.66 GHz or Core i7 2.8 GHz) ID iMac11,1. 'how to reinstall osx for imac 27\''.

Western Digital makes some of the best hard drives around, and its 4TB USB-C hard drive fits right in with all its other excellent drives. This one can be found for under $120 and comes in six colors. This hard drive, however, is not an inherently USB-C drive — it's 'USB-C ready,' so it'll connect to your USB-C ports no problem, though it does not have a USB-C port itself. USB-C is certainly the port of the future, so grabbing a USB-C hard drive for your MacBook or MacBook Pro is the best way to take all of your files, music, photos, and more with you wherever you go without clogging up your Mac's own hard drive. The is your best option because it's affordable and reliable. This post may contain affiliate links. See our for more details.

When this is the case you need to format your USB to fix the problem. This is where we should you how to format a USB stick on a mac. See all storage tutorials. Right-Click on the external hard drive in the Volume tab. Click Format. Name the hard drive. Select exFAT (or FAT for FAT32). Naming and Labelling Hard Drives. If you will be using multiple external hard drives on a project, you’ll want to make sure to keep them organized. This includes the way you name the drive and how you label it.