Erase mac hard drive el capitan


OS X El Capitan For Dummies

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Select Disk Utility , then Continue. Underneath the name of your Crucial SSD, you should see the partition you named when you formatted your drive. Click on this partition to highlight it. Now click on the Edit menu in the upper left corner of your screen and select the Restore Reward yourself with a beverage of choice. Leave your computer for a while and go do something fun! Once everything has copied over, click Done. The partition you named on your Crucial SSD should now have the same name as the partition on the existing drive you copied over. From here, select Recovery Disk Utility will now ask you to select the partition you want to copy to your new SSD.

Simply select the main partition located underneath your existing storage drive. It should be easy to find this because of how your drives and their associated partitions appear onscreen. The top-left section displays the storage drive s inside your computer and the partitions on each one.

Using New Disk Utility to Install OS X El Capitan

Select the partition for your existing storage drive, which will display a new set of options on the right side of the window. Select the Restore tab.


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Click the Restore button, which triggers the start of the data copying process. Note that in some older versions of OSX, you might see a checkbox where you will need to select Erase Destination before Disk Utility will allow you to copy your data. If you see this checkbox, just select it to proceed.

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Getting Rid of Your Mac? Here’s How to Securely Erase a Hard Drive or SSD

Leave your computer for a bit and go do something fun! Because with solid state drives - SSDs - Apple couldn't guarantee that a secure erase would actually erase the data. Follow these instructions and your data will be well and truly vaporized. Nuking the data on your system drive also nukes Mac OS X. If you are only encrypting your system disk - not erasing it - you can simply apply FileVault in place. You'll have the option to keep the password on iCloud or personally. If you are protecting your everyday Mac, I recommend keeping the password on iCloud.

If you don't, print out the password - take a screenshot - and keep it in a safe place. If you lose the password you could lose all your data! If you have more than one account on your Mac - something I recommend for troubleshooting - you'll be asked if you want that account to have access as well.

Click Enable User, enter that account's password and you're good to go. Once you've done that, click Continue and the next window will ask you to restart the Mac to begin the FileVault encryption process. Depending on the size of your drive and how loaded it is, encryption can take anywhere from minutes to hours. Choose the disk you are erasing and click Erase. A dropdown window will warn you that you are about to erase all the data.

Click Erase.

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The reformat will take a minute or less. Step 4 does not actually erase the data.

Why use Disk Utility

It just sets the drive data structures as if the disk were empty, but the underlying encrypted files are still there, and the password may be on the drive. To ensure full erasure go back to Step 2 and repeat the steps, which will proceed much faster since the disk now appears to be empty. After the second encryption and erasure is complete your data is gone forever. Back when disks were 30MB, it wasn't too hard to remember what was on them.

Wipe and reinstall OS X El Capitan - Apple Community

But today's terabyte drives are too big to rely on your memory. Deleting a partition is a simple, two-step process using Disk Utility, which received an overhaul with El Capitan. With your partition selected, click the Erase button at the top of Disk Utility. This will bring up a window with an Erase button.

Mac OS X El Capitan – Performing Hard Reset (Factory Settings)

Click Erase and then click Done. With the data erased from your partition, you still need to delete the now-empty partition in order to reallocate its space to the rest of your hard drive. To do so, select your hard drive from the left panel and then click the Partition button at the top of Disk Utility.

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