How to Free Up Mac Storage: Clean Photos and Videos with On-Device AI

The single biggest mistake in a photo cleanup is scanning everything at once. When the same picture exists in your Photos library and in a synced Dropbox folder, a combined result list makes it impossible to tell which copy is the one you actually rely on.

Scan one source at a time, in this order:

• Photos library first. This is usually your source of truth, so you learn what a keeper looks like before you touch anything else.
• Then Mac folders. Downloads, Desktop, and the old backup folder you copied before a migration.
• Then each cloud folder separately. iCloud Drive, then Google Drive, then Dropbox, then OneDrive.

No cloud sign-in happens inside the app. It reads the folders the official desktop apps already sync to your Mac, which is why the analysis can stay local.

An exact duplicate is the same image content stored more than once. Matching is content based rather than filename based, so IMG_4021.jpg and IMG_4021 copy.jpg land in the same group even after a rename.

One copy in each group is always kept and marked as the best copy, so a full group can never be wiped by accident. Every group shows the file size, the date, and how much space it can recover, and you can filter results by date range, size, and file format before deciding.

This is the only category you can reasonably clear in bulk. You are not losing image data, only redundant files.

A photo library rarely has thousands of byte-identical files. It has thousands of nearly identical ones: the next frame in a burst, a re-compressed copy that came through a messaging app, an export at a different size, the same view shot four times because the light kept changing.

Similarity is measured on your Mac with Apple's own vision technology, and you control how aggressive it is. A similarity threshold slider decides how close two photos must be to end up in the same group, and a capture-time setting decides whether shots taken minutes apart should be compared at all.

Inside a group you can open two photos side by side with synchronized zoom, which is the fastest way to settle the question that actually matters: is the difference between these two frames worth a hundred megabytes? The app suggests a keeper, but the choice stays yours.

Out-of-focus and motion-blurred shots are the easiest deletions in any library, and the ones people never get around to because finding them by scrolling is unbearable.

Each photo gets a sharpness score calculated on your Mac, and results are sorted so the worst offenders come first. Blur sensitivity is adjustable, from only the truly ruined shots to anything slightly soft. Double-click any photo to see it full size before deciding, because a shallow depth of field and a genuinely missed focus can look identical in a thumbnail.

This is the least known trick on this list and often the largest single win. A Live Photo is two things stored together: the still frame you see, and a video of roughly a second and a half around it. That video is frequently as large as the photo itself, sometimes larger.

Removing the motion keeps every picture. In your Photos library the still is saved again without the video, keeping its capture date, location, favourites, and albums, and the original moves to Recently Deleted for 30 days. In folders and cloud drives a Live Photo is a pair of files, such as IMG_0001.HEIC next to IMG_0001.MOV, and only the .MOV goes to the Trash, so it stays recoverable.

If you have a few thousand Live Photos you have never once played back, this single pass usually recovers more than everything else combined.

Bursts are the definition of storage you did not mean to use. Thirty-eight frames of a bird taking off, captured in eleven seconds, and you needed exactly one of them.

Bursts are grouped by capture moment and reviewed one moment at a time, with unreviewed, reviewed, and review-later states so a long session can be picked up later without losing your place. You choose the keeper. Nothing is selected or deleted for you.

If your camera shoots RAW + JPEG, every photo arrives twice: a large editable original and a smaller ready-to-share copy. Over a few trips that habit alone can be a hundred gigabytes.

Pairs are shown side by side with both file sizes, so you can decide per shoot whether you still need the RAW. One honest limitation is worth knowing in advance: Apple Photos treats a RAW + JPEG pair as a single item and does not let apps delete only one half. To remove just one format, scan the folder your camera originals came from instead of the Photos library.

Video cleanup is three separate jobs, and they are worth doing in this order:

• Duplicate videos. Copies of the same file, matched by content. Same rule as photos: keep one, remove the rest.
• Similar videos. Different versions of the same footage, typically an original next to a compressed export or a trimmed share copy. Compare the poster frames and keep the version you would actually reuse.
• Largest videos. Not duplicates at all, just a sorted list of what is eating your disk. Ten minutes here usually beats an hour anywhere else.

Because a single 4K clip can be larger than a thousand photos, this is where a cleanup goes from satisfying to genuinely useful.

Screenshots are reference material with an expiry date: a receipt, a confirmation code, a map, an article you meant to read. They pile up faster than photos because they never feel like they take up space, and on a Retina display a single one can be several megabytes of PNG.

They also carry almost no sentimental weight, which makes them the ideal warm-up. Clear a few hundred screenshots first and you will have recovered a visible amount of space before you make a single difficult decision about an actual photo.

Cloud services keep files online-only to save disk space, which is exactly the situation where a careless cleaner does damage: it compares placeholder stubs instead of real images and calls everything a match.

Metadata, cached previews, and thumbnails are checked first here, and an original is downloaded only when an analysis genuinely needs the pixels, under download limits you can see and control in Settings. Groups matched without downloading the original are labelled as likely identical rather than confirmed, which is your cue to check those before removing them.

The warning that always applies to synced folders: deleting a file from a Dropbox or Google Drive folder on your Mac deletes it for every device on that account. Make sure the copy you keep is the one you want everywhere.

The safety model is worth stating plainly, because it is the part that decides whether a cleanup was a good idea:

• No automatic deletion. Every removal needs your confirmation, and each group shows the space it will recover before you commit.
• Trash first. Files go to the Mac Trash, Photos library items go to Recently Deleted for 30 days. Space is freed once those are emptied.
• Undo and history. Supported cleanup actions can be undone, and cleanup history records what was removed and how much space came back.
• Local scan history. Scan history stays on your Mac, and you can clear it at any time. No photo content is uploaded by the app.

Back up with Time Machine before a large pass anyway. It costs nothing and it removes the only real reason to hesitate.

If you want one pass that gets you most of the way there, work top to bottom:

• Largest videos. A handful of decisions, tens of gigabytes.
• Live Photos. Every picture kept, the motion clips gone.
• Duplicate videos, then duplicate photos. Safe bulk removals with a keeper always protected.
• Screenshots and blurry photos. Fast, low regret, immediately visible.
• Similar photos and bursts. The slowest step, so do it last, in groups, when you are not in a hurry.
• RAW + JPEG pairs. Only if you shoot with a camera, and only per shoot.

After a proper first pass, a short scan every few months is enough. The library stays clean because the categories that refill fastest, screenshots and bursts, are also the fastest to clear.