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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.
#Build old os x boot disk on sierra mac
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.
#Build old os x boot disk on sierra 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. Patience: Obviously, this process will take some time so you need to make sure you have an hour or two to spareĪfter making sure everything is ready, it’s time to prepare your Mac for the installation.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.
Make sure the installer is fully downloaded (about 5 GB)
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MacKeeper allows you to free up necessary gigabytes easily. In the main window, you’ll see a pop-up menu under “Select the volume to become the installer.” Click on the menu and select your drive.Please note that before installing any system, you need to ensure there is sufficient space on your Mac.It’s OK if it’s not formatted as a Mac drive. Then follow these steps to create your bootable macOS High Sierra drive.
When the download is done, you can move it over to your Applications folder. It now does.ĭownload Install Disk Creator by clicking on the link above. There’s another app called Diskmaker X that I’ve used before, but during the original writing of this article, it didn’t support High Sierra. It has been updated to support High Sierra. There’s a free app called Install Disk Creator that you can use to make the installation drive. Make a bootable installer drive: The quick way If the installer auto launches, press Command-Q on your keyboard to quit the app. This will download the installer to your Applications folder. Under the High Sierra icon on the left of the banner, click on the Download button. This link should open the App Store app and take you directly to High Sierra. Click here to go to the macOS High Sierra section of the App Store. You also won’t find it in the App Store app under Purchased. If you already installed High Sierra, you won’t find the installer app in your Applications folder.