How to check free space and eject drives in NotchStar

Disk and storage Published 4 November 2026

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To see how much space is left on your Mac, hover over the notch, open the Disk tab and stay on Overview. It lists every mounted drive with its name, a bar, and a line such as 180 GB free of 500 GB. No scan is needed for this part.

What you see

One row for each drive, including your Mac’s disk and any external or removable drive that is mounted.
Hidden system volumes are left out.
The figure for free space is what macOS calls available for important usage. That counts space it can reclaim, such as purgeable files, so it can be higher than the plain figure df prints in Terminal.

Eject a drive

External, removable and non internal drives show a small eject button on their row. Press it and NotchStar asks macOS to unmount and eject the drive. Your startup disk never shows the button.

If macOS cannot eject, because a file on the drive is open, nothing happens. Close what is using the drive and press the button again.

What to do next

Overview also holds the scan for caches, logs, Xcode data and old downloads, and that starts only when you press Scan. To see what is using the space, go to the Space section: find the biggest folders. For the ring in the System tab, read what the disk gauge shows.

The Disk feature page lists every section, and what the scan finds covers the cleanup groups.

Quick answers.

Does the free figure include purgeable space?

Yes. It uses the capacity macOS reports as available for important usage, which includes space the system can reclaim.

Link to this answer

Keep reading.

Disk space, duplicates, apps and cleanup: See free space, find big folders, duplicates and app leftovers, compress media and clean caches from your Mac notch. Everything goes to the Trash.
What the disk gauge in NotchStar shows: The disk ring in the System tab shows how full your startup volume is, counting space macOS can reclaim as free, so it can differ from Terminal.
What the NotchStar Disk scan finds: The Overview scan finds app caches, logs, Xcode build data and downloads untouched for 90 days. It lists them and removes nothing until you choose.
How to find the biggest folders on your Mac with NotchStar: The Space section measures your home folder and ranks folders by size. Click one to look inside, show it in Finder, or move it to the Trash.

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