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Some local snapshots aren't deleted

It is possible that some Time Machine local snapshots aren't deleted. In this case, proceed as follows:

1.

Quit OnyX.

2.

Open the Time Machine pane of System Preferences, and turn off the Back Up Automatically option.

3.

Restart your computer.

4.

Run OnyX and delete Time Machine local snapshots again.

5.

After the process has completed, turn on the Back Up Automatically option in the Time Machine pane of System Preferences.