Take Backup in Time Machine Before Install macOS Big Sur, Mojave, High Sierra, OS X EI Capitan

Last Updated on Jan 7, 2021

A good habit in the case of update OS on any device takes full backup without taking risk or haste about using new OS X. Here I cover the full guide on How to Backup full Mac before the update with the latest MacOS. Your Mac running macOS Big Sur, MacOS Mojave, MacOS High Sierra, Sierra, EI Capitan, or Yosemite. In any case, you skip steps for Taking Backup in Time Machine, you might lose data then you have to use any of data recovery tools for Mac. A time machine is an official way to take a backup of your full system, Settings, Mail, Contacts, Photos/ Videos, Document, and folder. One of the secure service given by Apple within your device. Learn how to start Time machine backup on your device.

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Compatible Devices: MacBook, iMac, MacMini, MacBook Retina, MacBook Air.

OS X Version: macOS Big Sur, MacOS High Sierra, MacOS Mojave, Mavericks, Yosemite, or Upcoming also.

So you can take full backup in the external drive, So you need one high capacity data storage external drive. I think 6TB best suited for this time and then you can use remaining space for Any Use. You can order the top best External Drive for Mac.

Step for Taking Backup in Time Machine on Mac OS X

  • Step #1: Go to the Apple Menu
  • Step #2. Next Click on System Preference.

Apple Menu and System Preference Screen on Mac

  • Step #3: Next, Find Time Machine and Open it.Find Time Machine in System Preference
  • Step #4: Choose, Startup Backup Disk.

Start to Take Backup in Time Machine on Mac OS X

Here showing Bootcamp, it’s hence that Dual OS running on single Mac (macOS 11 and Windows). Otherwise, you will see your macOS system name only.

If you choose Bootcamp, you Will take full system backup means all the partition data.

Note: if you connect any third party drive for large backup, the external drive also seen in the list.

  • Step 4: Then, Click on Use disk.

Choose Drive for Backup and Save

  • Step 5: Next, Enable Time machine backup toggle when you want to start.

Time machine always stores the latest data, in the case, your drive might be full then Time Machine erases old data – Backup file automatically.

Time Machine Backup settings on Mac

Time Machine Backup settings on Mac

Once your Time Machine Backup is Completed into External Drive, you will get the notification on your Mac screen.


Enable Time Machine directly from the top menu bar, click on the Time Machine icon and Start Backing up on your Demand “Back Up Now“.

Time Machine Backup Manage from Top Mac menu Bar

Time Machine Backup Manage from Top Mac menu Bar

Sometimes we fail to take Backup Mac using Time Machine.

You might need: Time Machine Backup Stuck on Preparing Backup or In Progress.

Still, have you confused on the way for Taking Backup in Time Machine or query on Time Machine backup stop automatically, and then share your problem with us on the comment box.

Jaysukh Patel is the founder of howtoisolve. Also self Professional Developer, Techno lover mainly for iPhone, iPad, iPod Touch and iOS, Jaysukh is one of responsible person in his family. Contact On: [email protected] [OR] [email protected]

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