Lost Dvd Player on I Mac How Do I Down Load Again
Is it time to sell or give away your old Mac? Or do you simply want a fresh start to make clean up your motorcar? Here's how to securely delete all of your files, then install a fresh version of macOS.
If you're selling or giving away your computer, this is the merely mode to brand sure whoever ends up with your Mac can't access to your files, and won't have to deal with any modifications you've made to macOS over the years. Don't just delete your user profile and call information technology a day—you'll desire to completely wipe it.
Before you kickoff, brand sure you transfer any files you desire to keep to a new computer or external drive. Even if you don't intend on wiping your drive, information technology'south a good thought to back up before reinstalling your operating system.
Footstep One: Kicking From Recovery Manner, or an Installer
Your Mac's Recovery Mode is a treasure trove of useful tools, and it'southward the easiest way to wipe your computer and offset from scratch. Close down your Mac, turn it on while holding down Command+R. Your Mac will kicking into the recovery segmentation.
If you're using an older Mac (from 2010 or earlier), at that place'southward a run a risk that y'all tin can't use Recovery Manner. On those devices, concur "Selection" while turning your computer on, then select the recovery partition instead.
If neither of these options work, don't panic! You've got a couple of options yet. You tin admission recovery without a partition using Network Recovery: hold Control+Shift+R while turning on your Mac and information technology will download the Recovery features for you. Failing that, you tin create a bootable USB installer for macOS Sierra, and boot from that by holding "Option" while turning on your Mac.
One time you've managed to open upwards the Recovery Manner in some fashion, we tin move on to wiping your drive securely.
RELATED: 8 Mac System Features You lot Can Admission in Recovery Way
Footstep Two: Deeply Wipe Your Hard Bulldoze (Optional)
If you want to re-install your operating system, but leave your files in place, you lot tin skip this step. Your user accounts and files volition stay exactly where they are—simply your operating system will be overwritten. We recommend backing up files before you lot practise this, merely in example, but otherwise you're prepare for footstep three.
If you want a truly clean installation, however, y'all need to showtime wipe your difficult drive. We've shown y'all how to securely wipe a hard drive with your Mac, and doing then in Recovery Mode isn't really unlike from doing so within macOS.
To get started, click the Deejay Utility pick.
Depending on how you started Recovery Mode, you may exist presented with the choice to beginning Disk Utility correct abroad, every bit seen above. If not you tin can find Deejay Utility in the menu bar: click Utilities so Disk Utility.
You lot'll now see your list of hard drives. Click your principal bulldoze, so click "Erase"
If you're wiping a mechanical drive, click "Security Options" in the window that pops up. (If your Mac has a solid state drive, you can skip this office: your SSD will already securely erase files thanks to TRIM. You still need to wipe the drive, however, or your files will remain in identify, then skip to the finish of this step to do so.)
Now movement the punch upwards, to randomly write data over your entire drive. You only need to write over a drive in one case to securely wipe information technology, just if you're paranoid you tin can also wipe it 3 or 5 times.
Click "OK" one time you've decided, only remember: if your Mac has a solid country bulldoze, you do not need to use these options. Just give your drive a proper name (I recommend "Macintosh Hard disk drive", just for consistency'due south sake), so click "Erase" to start the overwriting process.
If you opted to wipe your drive deeply, this might take a while—30 minutes to an hour is not unreasonable for one laissez passer. If you choose three or five passes, yous might want to go out this running overnight.
Stride 3: Reinstall macOS
With your information wipe complete, you are at present gear up to reinstall macOS. If you booted from a functioning recovery sectionalisation, click the "Reinstall macOS" push button. The installation process will begin.
If you booted from a USB deejay, click "Continue" to accelerate to the installer.
Yous'll be asked which difficult drive y'all want to install to. Choose the Macintosh HD you named earlier.
But like that, macOS will begin installing.
This might take a while. Eventually, your Mac will restart and inquire you to create an account. If y'all're giving your Mac away or selling information technology, we recommend that you lot simply shut down at this signal and let whoever you lot're giving your Mac to create their own account. After all, it's theirs now. Otherwise, enjoy your at present-fresh Mac!
Source: https://www.howtogeek.com/186860/HOW-TO-REINSTALL-OS-X-ON-YOUR-MAC-WIPE-YOUR-DRIVE-AND-CREATE-USB-INSTALLATION-MEDIA/
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