- Before proceeding, make sure that you have updated your Mac OS to the latest version.
- Next, open Finder by clicking the Finder icon available at the Dock panel.
- Select the Go menu available at the top of the window and select the Applications option from the pull-down menu.
- Verify the location of the backup folder that contains the Time Machine backups.
- Next, click the Applications tab from the left-side panel and give a double-click on the Utilities icon.
- Locate the Disk Utility icon and give a double-click on it to launch the Disk Utility.
- If you cannot access the Disk Utility icon, press the Command + Spacebar shortcut keys to open Mac’s Spotlight search.
- Type ‘disk utility’ in the search panel and press the Enter button to locate the Disk Utility.
- In the Disk Utility window, select your Time Machine external drive from the left-side panel and click the Partition tab at the top of the window.
- Click the Add icon to add a partition.
- Make use of the drag handle to resize your partition.