How to erase hard drive mac lion

Reinstall OS X Lion and wipe hardd… - Apple Community

First, erase a drive without the overwriting part, and reinstall OS X. After you boot, launch Disk Utility, select the startup volume, and click the Erase tab. Now use the Erase Free Space option, which also offers 1, 3, and 7 passes of erase, and only empties out unused parts of the disk. The advantage is that your computer remains available though often slow while this operation is underway. If you use FileVault, any data "left behind" on your erased hard drive will be totally unreadable by your Mac's next owner.

Enter the password for any FileVault-enabled user account, and the disk is unlocked and can be erased. Without the key, which is uncrackable in any realistic period of time by any current technology, the erased data is as good as gone as if it had been written over millions of times. You can then install OS X on that partition, either from the recovery system or via an external drive. Reader Peter wondered how FileVault figures in to cloning a disk. Andrew Robertson writes that when he upgraded to Yosemite, his recovery drive remained out of date with You can reinstall This should upgrade the recovery partition.

To recover a key , first start up OS X normally, and enter the wrong password three times.

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This is also how to use iCloud password recovery on non-FileVault systems. Email us at mac macworld. How to prepare a Mac for sale or a return to an employer. 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.

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Then proceed to highlight your computer's hard drive; select the Erase tab, make sure OS X Extended Journaled is selected, then hit the Erase button. In El Capitan, after you select the Erase tab, a pop up will appear with the details. Keep the default settings and select Erase. Click the Reinstall OS X option in the menu and proceed to follow the directions.

You will need to be connected to the Internet, so make sure you're plugged in via Ethernet, or are connected to a Wi-Fi network.

You should now have a fresh copy of Mac OS X installed, and your computer is back to its factory settings. All without the need for a recovery disc or thumb drive. Thank you, a friend asked me to get a new install OS X and this seems easy, but just one question. It's downloading a fresh copy from Apple's servers. Apple OS's are now free, so they're not too concerned about verifying. Thank you for the steps, i was wondering, we need to be connected to the internet as it will download the osx again? I'm currently running the new Yosemite. Ugh how frustrating I backed up my files and was already to go and restarted twice and could not get this menu to come up Is this not possible on Snow Leopard?

This only works for Lion and higher. If my computer originally came with Snow Leopard but has since been upgraded to Mavericks, will I be able to do the factory reset back to Mavericks? Or will it revert all the way back to Snow Leopard, requiring the discs? Yes, it should work just fine.

Securely erase a Mac hard drive

Lion through El Capitan has the Recovery built-in, and it will reinstall OS X using whatever current version you are on. If not, you might need to download the firmware to use the Internet Recovery version, but this installs whatever was originally on the computer, so you'd have to update your OS again from the Mac App Store.

Everything works fine up until the last step after entering my ID and Password Try again later. My hard drive crashed on my Imac took it to computer repair they installed new hard drive, tried to recover data but could not, when we presented the imac to the apple store they told me i would have to buy back my old hd from them um hello no way, so thats why we went to another place that works on macs, so apple said i had lion on the mac, i couldnt remeber but now i remember i had leopard, the computer place installed lion, well now I cannot get any of my programs installed from the dics i have, like my photo software, etc, any cd i put in stays in for a minute then pops back out.

I turn on the computer, hold the command and r keys for 15 sec. Oh the joy of reading Service currently not available when it tries to download Mavericks online and all the while having only windows computer working. My late Mac Pro would not boot this AM. Would not let me reinstall OS X. Would any think it is more than a bad internal drive 1? I pulled the drive 1 out, checked all the pins and reinstalled into its slot firmly. It goes to grey screen and first tone There is not the "Reinstall the OS X" in my computer.

Why not? Now what can I do? Please help me.

How Do I Reformat My Hard Drive In OS X Mountain Lion?

I really need my computer for work. 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.

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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. If I am currently running a public beta of El Capitan, will this method still work and install the official release of El Capitan? There's a good chance that it will re-install the public beta version, since it was the most recent OS installed on your Mac.

Apple suggests installing from the Mac App Store instead. Now I need to format the new HD.

Do I need a utility disk? I never created one on this Macbook Pro can I create a utility disk from a newer iMac?