Make sure that the bootable macOS High Sierra installer you just created is connected to your Mac, whether it’s a USB flash drive or an external hard disk. Get Setapp, a toolkit with fixes for all Mac problemsStep 3: Erase and Reformat the Mac’s Boot Drive. However, if you plan on only using a drive on your Mac and it has MacOS High Sierra or newer installed, you. Formatting facts for Windows and Mac. How To Set Up An External Hard Drive For Use With Mac OS X By Shujaa Imran / When you first attach a hard drive to your Mac, it should automatically mount and be ready to use however before relying on it, you should consider taking a couple of precautionary steps to ensure that the drive continues to work as expected.So you're setting up an external hard drive.Secure erase options are available only for some types of storage devices.All about fixing external hard drive not showing up on Mac and recover lost data from external hard drives on macOS Big Sur/Catalina/Mojave/High Sierra.That’s why, sometimes, it makes more sense to run a clean install. (Optional) If available, click Security Options, use the slider to choose how many times to write over the erased data, then click OK. Click the Format pop-up menu, then choose a file system format. Your data remains but your software and file junk remains as well.Don't know how to install macOS High Sierra on your mac Then you should not miss this guide It provides everything you need to know about macOS High Sierra.Click the Scheme pop-up menu, then choose GUID Partition Map. It’s quick, easy and means we can be back up and running in no time, with all your apps and data ready to use.macOS High Sierra Installer, available from the Mac App Store.Notice: USB drive is needed for a clean install on your Mac’s startup drive. How to prepare your Mac for the clean installBefore you do anything, check that your Mac is able to run Apple's new operating system.To complete the clean install procedure described below, you'll need: Whatever your reasons, here is how to clean install macOS High Sierra. Or maybe you just want that fresh out of the box Mac experience again.
Signup to try Setapp for free.The process of performing a clean install involves wiping your Mac’s main drive clean so it’s essential that you back it up immediately before you start. With Setapp, you always have the latest full version of every app. It’s a more lenient and less intrusive way because your Mac doesn’t get wiped clean, only your system.If you don’t know which one you have, go with the first option, startup drive.How to clean install macOS on a startup driveOnce you have everything that's needed, let's begin. Don’t worry, this step-by-step guide will walk you through all you need to do.You don't need to dig through Internet to search and and download each apps mentioned below, all of them available on Setapp. This way entails one important fact: all your files and data will be deleted during the process.If you have another drive or volume other than your startup drive, use the second way which is clean installing on a non-startup drive. If you only have one drive and it’s not partitioned and this is where you have all your files and your OS, your choice is to clean install on the startup drive. go for a system cleanup and backup your data - this will allow you to easily return your Mac to the condition it was in before you installed macOS.Choose the right way to clean install macOS High SierraBefore you proceed, you need to make a choice how to run a clean install. Set Up An External Hard Drive High Sierra Manual File CleanupStart with a system cleanupDelete everything you don't need - large and old files and archives, useless apps, cache data and other junk, duplicate files - all these files silently eat up the disk space, duplicate images are especially hard to find out.You can always use CleanMyMac to cleanup macOS system junk, large and old files, and remove unwanted apps. It will save to hours of manual file cleanup and polish your system before the backup. An easy way to go about this is to get a Mac cleaning app like CleanMyMac. And move your images and documents into the cloud or to an external drive, just to be on the safe side.As well as backing up your Mac, you should also take screenshots of settings in any apps you’ve customized so that you can set them up again quickly later. Also, a cloned drive makes copying files back to your newly-updated system very easy. It’s also a good idea to create a bootable clone, so if anything goes wrong you can go back to where you started easily. It’s more powerful than Apple’s own Time Machine. As soon as it does, select File and Quit (or keyboard shortcut Command-Q) so it doesn’t install. When it’s finished, the installer will launch. Here is a link to find it on apple.com. Download macOS High Sierra from the App Store. ![]() ![]() Agree to the terms and conditions, then select your Mac’s internal drive. Click Continue, then click Continue again when the next window appears. Take your bootable USB and connect it to your Mac.When the macOS Utilities screen appears, follow these steps: Restart your Mac and hold down Command-R to boot into recovery mode. Сlick Startup disk and choose the installer you just created. In order to re-install Setapp apps, go to setapp.com to get Setapp installer or download Setapp here. Then you’ll have to set up a new admin user account.Once you’ve done that, you can start installing apps. Then you’ll need to type in the details for your iCloud account. So, you’ll need to connect to your wifi router and type in the password. Skype for mac wont go onlineErase your non-startup driveBefore you install the new OS on it, you need to erase all data on the drive you’ve chosen for it. And you can copy any documents, photos or other files you need from the backup you made at the start.Find more information about Apple Mac updateClean Install macOS High Sierra on a non-startup driveYou don’t need a backup for this option, it’s safer and faster than the previous way but only available to you if you have an extra drive or your drive is broken down into volumes.Here’s how to instal your new macOS on the non-startup disk. That way you avoid cluttering up your brand new macOS.If you use a cloud service like Dropbox, now is the time to re-connect. Other apps can be downloaded as and when you need them. Change the target drive for installation. Install macOS High Sierra to your non-startup driveLaunch the Installer from the Applications folder and press Continue. Download the macOS High Sierra Installer from the Mac App StoreTo download it, open the Mac App Store and go to the Updates tab ( Here is a link.) When your installer is downloaded it will launch automatically but you need to quit it.Fortunately, for this option you don’t need to create a specific bootable drive and you can simply use the installer from your startup drive and install the macOS onto the other one. Choose the volume you’d like to clean up and click Erase.If you still need some info from that drive, you can use an app like ChronoSync Express to sync it with another drive and keep the files. Saves you time and money on looking for apps for your daily tasks. More than 100 apps in one suite available by subscription. Clean install (when performed on a startup drive) does remove your apps so if you don’t feel like looking for every app and their licenses again, get Setapp. That entails creating a new user account, setting up date and time zone etc.Now that you have the latest macOS, you can enjoy its superior features and top performance. From then on simply follow the installation guide and after that you’ll have to set up your Mac as a new one.
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