Sometimes itâs a good idea to do a clean install of a new Mac operating system version. Whatâs a clean install? That means that the hard drive is erased completely and reformatted, which removes not only the current Mac operating system but all data, files, applications, you name it⦠Just think of it as a brand new computer having the operating system installed on it for the first time. In this post, weâll describe how to do a clean install of macOS 10.13 High Sierra.
Nov 03, 2019 Thinking about buying a new Mac mini, to replace my one from 2011. However, I'd need to install Mojave since some of the programs I use don't support 64-bit, plus I need to clean up my iTunes library a lot before I switch to the new media apps. Anyone know if it's possible to buy a Mac mini. Nov 07, 2017 If youâre gearing up to sell your Mac, then the last thing you want to do is just shove it in the original box and call it a day.Your computer contains personal information that could tell the new owner a lot about you. There are six steps for preparing most Mac computers for sale, but if you have a MacBook Pro with Touch Bar, then thereâs one additional step to add to your checklist. Jun 29, 2017 How do you reset a Mac Mini to factory settings? By âreset to factory settingsâ, I suppose you mean to wipe all data from the computer and restore it to a clean system installation, as if it had just come from the factory with a fresh system insta.
Select the volume that you want to erase. Click âErase.â Disk Utility will now wipe your hard drive. Once the process is complete, select âQuit Disk Utility,â to return to the main macOS Utilities window. Installing a fresh copy of macOS via Recovery Mode. For the majority of Mac users, reinstalling macOS means booting into Recovery Mode. In some cases, users need to permanently wipe hard drive data under macOS 10.12 Sierra. For instance, when a user wants permanently and completely to clean up all junk files and virus infected files from a hard drive on a Mac with 10.12 macOS Sierra system, he or she needs this kind of solution to wipe hard drive under macOS 10.12 Sierra.
Reasons to Perform a Clean Install
Before we get started, make a decision as to whether you want to do a regular update or a clean install, because a regular update is much easier to perform than a clean install.
The idea behind a clean install is to start with a completely bare machine, getting rid of any old data, files, preferences, settings, old drivers, apps you no longer use, and so on. In many cases, a clean install can improve the performance of a sluggish Mac. Clean installs are also useful if a software or system software update has somehow trashed your existing operating system or if you have replaced a hard drive.
Be sure you have plenty of time available to complete the complete install, as it can sometimes take as much as a day to go through all the steps.
Step 1: Backup Your Mac
As noted, weâre going to completely erase everything on the Mac. Make sure that you have access to all installation media for your apps (developer websites, Mac App Store, DVD or CD), and itâs a good idea to make a Note of all apps that you wish to re-install. In addition, be sure that you know all of your online account passwords and logins â for this, a password manager like 1Password can be very useful.
Itâs very useful to also have copies of all of your license information for Mac apps, since those that require a license or activation will need to be set up after your clean install.
Now, what kind of backup to you want to do? A Time Machine backup of your entire system is quite acceptable, or you can use an app like Carbon Copy Cloner or SuperDuper! to create a bootable clone of your Mac.
For those really important files, such as important documents, photos, videos, and so on, you may want to make a separate backup onto other media or to a cloud service like iCloud Drive or Dropbox.
Do NOT go further without making a backup. Remember, your Mac will be completely erased and if you have not copied your information to another location, you will lose it.
Step 2: Create a Bootable macOS High Sierra Installer
You can create a bootable macOS High Sierra install disk by knowing just what Terminal commands to use. However, thereâs an easy way to do this step, and thatâs to use DiskMaker X 7. We just published a step-by-step process for creating your bootable macOS High Sierra installer using this free application, so take time to read the process and to make your installer disk
When youâre done with steps 1 and 2, you can proceed to the scary part â erasing and reformatting your Macâs boot drive.
Step 3: Erase and Reformat the Macâs Boot Drive macOS Startup Manager, showing all internal and external drives
Make sure that the bootable macOS High Sierra installer you just created is connected to your Mac, whether itâs a USB flash drive or an external hard disk. Reboot your Mac, and hold down the Option/Alt key on the keyboard until the macOS Startup Manager Screen appears. It looks something like this:
While the image above shows the Macâs boot drive âMacintosh HDâ as selected for boot, we do not want to use that drive; instead, use the arrow keys or your trackpad to point the cursor at âInstall macOS High Sierraâ, then press Return.
The Mac boots off of the High Sierra installer into the macOS Utilities screen (image below is from a photograph of an actual Mac display):
macOS Utilities, with Disk Utility highlighted
Click Continue to proceed to Disk Utility. Once Disk Utility is on your screen, select your boot drive (itâs usually named Macintosh HD, as in the screenshot below) and then click the Erase button in the menu bar.
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When promoted, select âMac OS Extended (Journaled) as the format type, with GUID Partition Map as the scheme. Note that if your Mac can be converted to the new APFS file system, it will happen during the macOS High Sierra installation. At this point, itâs perfectly fine to use the âoldâ format defaults.
Once youâve selected the format type and scheme, click the Erase button. Remember, this erases everything on the Mac, so if you ignored the repeated reminders earlier to have complete backups of your Mac, youâre going to lose everything.
As soon as the drive formatting is completed, quit out of Disk Utility. You will be returned to the macOS Utilities screen.
Step 4: Install macOS High Sierra
The second item from the top of the macOS Utilities screen is âInstall macOSâ. Select this item by clicking on it, then click on Continue. In the installer screen, select âMacintosh HDâ (or whatever your boot drive is actually named) as the disk for macOS High Sierra to be installed on.
The installation of macOS High Sierra will take a while, and when itâs completed the Mac reboots and goes through the setup procedure that is familiar to anyone who has owned a new Mac. Youâre asked to enter your Apple ID, create a user account, and setup iCloud. At this point, you have a clean version of macOS High Sierra on your Mac.
Step 5: Restore Data, Files and Apps
This step is probably the most time-consuming one in the entire clean install process. Copy your document files to the newly-cleaned Mac from an external drive or cloud service â note that if you have chosen to save all of your documents in your iCloud Drive, thereâs no need to perform this step.
App reinstalls are done quickly from the Mac App Store, and installers for other apps can be downloaded from the developers.
Wipe Mac Mini High Sierra Clean For Sale Near Me
You may need to set up your email accounts again, particularly for accounts that are on servers that arenât associated with Apple or Google. If you use a cloud backup service like Backblaze, be sure to set up the Mac client again so that you can begin your backups as soon as possible.
Wipe Mac Mini High Sierra Clean For Sale Near Me
Thatâs it! You now have a squeaky clean installation of macOS High Sierra on your Mac. You may find, as I did when I installed macOS High Sierra on my iMac using this process, that you suddenly have a lot more space available on your computer and that it runs a bit more smoothly. Let us know how your clean install went by leaving a note in the comments section below.
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