Jump to OS X 10.10 Yosemite - Select Mac OS Extended (Journaled) from the Partition Format popup menu. Format the Volume.
Instructions for installing an internal drive as a bootable or a storage drive in MacOS X. If the SATA drive will simply be a storage drive, please see the 3rd section of this article - Installing a SATA Drive as a Storage Unit. Installing a SATA Drive as a Boot drive 10.11 Note: Reformatting the drive will erase all data on the drive, so you should copy any data you want off the drive prior to formatting. Physically install the drive into the Mac.
Insert the Mac OS X install CD or USB drive. Power on the computer while holding down the option key.
Select Installer. Select Disk Utility. Highlight the drive. Select Erase.
Enter Volume information (Name, Format, and Scheme). Select Mac OS Extended (Journaled) for Format. Select GUID for Scheme. Select Erase. (Note: This will erase all data from the drive.).
Click on Disk Utility and select Quit Disk Utility. Select Install OS X from the options.
Select your drives as the destination and install Installing a SATA Drive as a Boot drive 10.6 to 10.10 Note: Reformatting the drive will erase all data on the drive, so you should copy any data you want off the drive prior to formatting. Physically install the drive into the Mac. Insert the Mac OS X install CD or USB drive. Power on the computer while holding down the option key. Select Installer. Select Disk Utility.
Highlight the drive. Select Partition. Select 1 Partition. Name the drive. Choose Mac OS Extended (Journaled) Partition for the volume format. Click Options - Select GUID.
Select OK. Select Apply (Note: This will erase all data from the drive.). Select partition.
Click on Disk Utility and select Quit Disk Utility. Select Install OS X from the options. Select your drives as the destination and install Installing a SATA Drive as a Storage Unit - 10.11. Physically install the drive into the Mac. Turn the Mac on.
Select Applications. Select Utilities. Select Disk Utility.
Select the Erase tab. Verify that the correct hard drive is selected in the left column. Enter Volume information (Name, Format, and Scheme). Select Mac OS Extended (Journaled) for Format. Select GUID for Scheme. Select Erase. (Note: This will erase all data from the drive.) Installing a SATA Drive as a Storage Unit - 10.6 to 10.10 Note: Reformatting the drive will erase all data on the drive, so you should copy any data you want off the drive prior to formatting.
Physically install the drive into the Mac. Turn the Mac on. Select Applications.
Select Utilities. Select Disk Utility. Highlight the drive. Select Partition. Select 1 Partition.
Name the drive. Choose Mac OS Extended (Journaled) Partition for the volume format.
![Format Format](/uploads/1/2/5/5/125580985/986473822.png)
Click Options - Select GUID. Select OK. Select Apply (Note: This will erase all data from the drive.). Select partition. Click on Disk Utility and select Quit Disk Utility. Select Install OS X from the options.
Select your drives as the destination and install. Allow time for the drive to format. Verify the drive is mounted on the Desktop.
As I've said before, for me. At one point, I realized that there were plenty of files on my Mac that I didn't need any more, but too many to delete individually. In other cases, your Mac can be experiencing some major malfunctions: constant crashing, locked controls, slow boot times, missing files, etc. Often, the best option to fix these problems would be to reformat your computer and reinstall your OS, but since most of us don't plan on ever taking this drastic measure, we don't obtain a recovery disc or thumb drive. Thankfully, the geniuses over at Apple have made the process easy for us—no need for a disc; no need for a drive—all you need is a decent internet connection. With just a few clicks of some buttons and your Mac is gonna be running like it did the day you got it. Best of all, this will work with Lion,.
Step 1: Back Up Your Files! Okay, so you may have a lot of files that you want to get rid of, but you definitely have some files you want to keep. In my case, I even have programs I want to keep so I don't have to re-download them after the process is over. Use a writable CD/DVD, a, or any of the multitude of cloud options to keep your important files backed up.
You could also create a Time Machine backup, but I wouldn't do a full restore later—just pick and choose things you want back after a fresh install—otherwise it could run just as sluggishly or erratic as it did before. Step 2: Restart Your Computer Once you've double-, triple-, and quadruple-checked your backups, restart your computer. Step 3: Press CMD+R The second you see a grey screen, hold the CMD and R keys down for about 15 seconds, then let go and you'll be taken to OS X Utilities recovery. PLEASE HELP!!
Whenever I turn on my iMac, it would load up to the apple logo and shut down after a few seconds. This happened ever time i tried to turn it back on again. I had a bit of hope but nothing ever changed so I decided to erase my disk and was immediately promoted me to restart my computer. When I did, it brought me a a symbol of a folder with a question mark which flashed forever. I held the power button to turn it off and hit it to turn it on again while pressing command and R keys at the same time, it brings me a sign of a spinning globe that loads forever. When I restart it and immediately insert its installation DVD while pressing key C, it brings me the apple logo and stays like that for ages. This is freaking me out.
I have read and tried so may solutions online but nothing has changed. Please help me with another way. In summery, my computer has no files and I won't install a new OS. So I'm having a slightly different issue. I've followed your steps, but every time I hit 'erase,' it brings up a notice saying: 'Disk Erase failed with the error: Couldn't unmount disk.' I've attached a pic of the error.
However, on the left one can clearly see the main '500.11 GB Toshiba MK5,' and below it, the 'Macintosh HD' option. This error pops up ONLY when I try to erase the Toshiba drive. But it allowed me to erase the Macintosh HD option.
Has my drive been erased nonetheless? Or do I still need to do something else? Is all hope lost? FYI: was running Mountain Lion. My original install discs are probably lost for good.