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I have a MacbookAir 11" from 2011, with only 64 GB of disk storage. Originally came with OSX Mountain Lion and now I'm thinking on updating it to macOS Sierra.

My question is: How much space does the macOS take? Will it take most of my storage space only for the OS? Or will I have enough space to work with?

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  • How much free space is available within the "60gb of total storage"?
    – user3439894
    Feb 14, 2017 at 18:26
  • @user3439894 In my current Mountain Lion I have 47gb of free storage.
    – medicengonzo
    Feb 14, 2017 at 18:37

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A clean install of macOS Sierra 10.12.3 from a USB Flash Drive takes a little less then 10 GB of space. If you do an in-place upgrade the Install macOS Sierra.app bundle takes a little less then 5 GB but can be deleted if after the upgrade it doesn't self-delete. So, you have plenty of space whichever way you choose to go. (The in-place upgrade method is assuming you have adequate free space to preform the in-place upgrade.)

As always with an OS Upgrade, make sure at the minimum that your user data is backed up, if not the entire system before performing the upgrade. Time Machine is a good way to maintain backups of the system.

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  • I do have enough space to download the Sierra.app Currently I have 47gb of free storage. Thanks for the straight up answer.
    – medicengonzo
    Feb 14, 2017 at 18:39
  • @medicengonzo, Yes, with "47gb of free storage" you have plenty of space to preform the in-place upgrade.
    – user3439894
    Feb 14, 2017 at 18:47

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