Mac os high sierra usb installer
![mac os high sierra usb installer mac os high sierra usb installer](https://photos5.appleinsider.com/gallery/24511-32164-quitinstaller-l.jpg)
A window will pop up asking if you want this disk to be your backup destinationĦ. Click on Select Disk and choose your external driveĥ. In the left side of the pop-up window toggle the switch from OFF to ONĤ. Go to System Preferences → Time Machineģ. One of the easiest ways to clean your Mac is to use an app such as MacKeeper that will easily and quickly delete all useless and duplicated files while keeping the useful stuff intact.Īfter cleaning your Mac, it’s time to back up your important files.Ģ. Therefore, you have to delete all this junk before backing up your data.
#Mac os high sierra usb installer install#
Obviously, you don’t want to install a new macOS and have tons of junk files and unused apps. Why? Well, your Mac might get slow due to system junk and other unneeded files. Back up your dataīefore backing up your data it’s always a good idea to clean your Mac first.
![mac os high sierra usb installer mac os high sierra usb installer](https://www.howtogeek.com/wp-content/uploads/2017/09/high-sierra-disk.png)
For this reason, you need an external HD that is at least the same size as your Mac’s internal memory External hard drive (optional): You need to back up your data to save your important files before installing the new macOS.
![mac os high sierra usb installer mac os high sierra usb installer](https://photos5.appleinsider.com/gallery/24427-31949-macos-high-sierra-macbook-bootcamp-hero-l.jpg)
Make sure the installer is fully downloaded (about 5 GB)