Time Machine - External Drive Size

评论推荐外置硬盘的容量是Mac的硬盘的1.5倍。

但是time machine会用尽移动硬盘上所有的容量。这样很浪费空间。

sudo defaults delete /Library/Preferences/com.apple.TimeMachine MaxSize

// e.g. 500GB的Mac硬盘,用750GB足够了。
sudo defaults write /Library/Preferences/com.apple.TimeMachine MaxSize 760000

Ref

How to limit Time Machine backup's use of external storage space

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