For the format, I believe it should say APFS, but if not, don't panic, it doesn't really matter. It's best to keep it as the same name your disk was already named. It will also ask you for a name, as it will recreate the disk so that you can use MacOS on it. It will ask you a format, but it'll already have an option selected in it. You simply have to click Erase, which is right under where it says Disk Utility at the top of the window. I told you to check the name of that disk in Step 2, so if you had it written down somewhere, you can confirm which disk has all your data on it. Whatever your main disk is, whether it be called Macintosh HD, or disk, or whatever you have the name set to, is the disk with all your data. Here's an image JUST to make sure we're on the same page.Īs you can see, I've only got 1 disk. It'll show you the various disks located on your Hard Drive or SSD, as well as the data on outside sources, like an external hard drive, memory card, or flash drive. Now it's time to say goodbye to your precious data until we restore it later. One of the options should allow you to enter Disk Utility. Once the loading has completed, you should see a menu with 4 options. As soon as the screen goes pitch-black, hold the keys Command and R at the exact same time until you see an Apple logo on the screen. Once you are 100% sure your backup has completed, go ahead and restart your MacBook Pro. The name of my disk is, "Macintosh HD", as seen written next to the image of the disk. Remember the name of your disk, and if you want you can even keep a record of the amount of storage you've got. Click the Apple logo in the top left, click About This Mac, and click Storage. This may help you during the next few steps. Open System Preferences, hit Time Machine, and then Backup.Īlso, do one more thing. This way, it'll be on the latest version of MacOS to prevent any problems regarding OS version.
#HOW CLEAN INSTALL MAC OS SIERRA DOWNLOAD#
Open the App Store, download MacOS High Sierra, then install.Ĭreate a Time Machine Backup now.
#HOW CLEAN INSTALL MAC OS SIERRA UPDATE#
You're going to want to update to MacOS High Sierra first. I'm going to make sure I write a complete guide for you so you don't have to go through the same pain I did. Here's a funny story: I went through a whole week long process to do exactly this because I was misinformed on the use of the Time Capsule. Well hello there, welcome to the Apple Support Communities. Sorry! This is meant for the thread creator. EDIT: Accidentally replied to the wrong person.
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