Press Shift+Cmd+5, record ten minutes of your screen to show a colleague a bug, and macOS writes a .mov file that can easily be several hundred megabytes to well over a gigabyte, depending on resolution and how much motion was on screen. Do that once a week for a few months, on top of a handful of longer recordings for demos or tutorials, and you have quietly accumulated many gigabytes of video sitting wherever the capture tool decided to save it — usually the Desktop. Unlike Downloads, which most people at least glance at occasionally, the Desktop is where these files land and then simply stay, because nothing in macOS ever prompts you to review or remove them. This article covers where they actually go, why they get forgotten, and the habit that keeps them from adding up.
Where macOS actually saves screen recordings
The built-in screen recorder, opened with Shift+Cmd+5, shows a control bar with capture options and, critically, an Options menu. That menu has a Save to section listing Desktop, Documents, Clipboard, Mail, Messages, Preview, or Other Location, where you can point it at any folder you choose. Desktop is the default on a fresh install, and most people never change it.
QuickTime Player's File → New Screen Recording uses the same underlying capture mechanism and, once you stop recording, prompts you to save the file — but if you don't actively choose a different folder, it tends to end up in the same default location as the Shift+Cmd+5 bar. Either way, the file format is .mov, and the encoding is either uncompressed or only lightly compressed depending on macOS version and hardware. That's a deliberate trade-off: capturing your screen in real time with heavy compression risks dropped frames, so macOS favours a codec that's fast to encode over one that produces the smallest possible file.
Why the file sizes add up faster than you'd expect
A short ten-second recording to show someone a menu bug is negligible. But a genuine ten-minute walkthrough — recording a build process, a client demo, or a bug that only reproduces after several minutes — can run to a gigabyte or more, especially at Retina resolution on a larger display. If you record your whole screen rather than a selected window, you're also encoding every pixel of desktop background and unrelated windows, which adds to the file with no benefit to whoever's going to watch it.
Multiply that by however many recordings you make in a normal month of remote work — bug reports, screen shares you decided to save "just in case," short tutorials for teammates — and it's easy to end up with tens of gigabytes of .mov files without ever making one recording that felt, at the time, like it was going to be a problem.
Checking and changing the save location
If you're not sure where your recordings are going, open the capture bar and check directly:
1. Press Shift+Cmd+5
2. Click "Options" in the control bar
3. Look under "Save to" — the current destination has a checkmark
4. Choose a different folder, or click "Other Location…" to browse to one
Pointing this at a dedicated folder — something like ~/Movies/Screen Recordings — doesn't reduce file size, but it does mean you have one place to review periodically instead of hunting through a Desktop full of unrelated files. The setting persists across recordings until you change it again, so this is a one-time adjustment rather than something you need to repeat.
Why recordings get forgotten on the Desktop
A screen recording almost always exists for a temporary purpose: showing a bug to a colleague, walking someone through a workflow once, capturing a demo that gets sent and then referenced for a week. Once that purpose is served, there's no natural moment where you're prompted to delete the file — it just sits there, indistinguishable at a glance from anything else on the Desktop, until you're scrolling past it months later wondering what it was for.
This is different from, say, a Downloads folder, where the accumulation is at least visible and mildly irritating on its own. A Desktop full of file icons doesn't always register as a storage problem, even when a few of those icons are hundred-megabyte or gigabyte video files. macOS has no equivalent of "you have 40 unreferenced screen recordings" — that judgement call is entirely on the person who made them.
Dedicated screen-recording software adds its own overhead
If you use dedicated screen-recording software beyond the built-in tools — for longer tutorials, multi-track recording, or editing directly after capture — the storage picture usually gets more involved rather than less. Many of these tools keep a separate project structure alongside the final export: raw capture footage, render caches, and sometimes multiple resolution versions generated during editing. The final exported video you actually share might be a few hundred megabytes, while the project folder behind it is several times larger and easy to overlook because it doesn't live next to the file you actually use.
If you use software like this regularly, it's worth checking its settings for where project and cache files are stored, and whether it offers a way to clear finished projects once you've exported what you need. The same principle applies as with the built-in recorder: nothing removes these files automatically, and the responsibility for cleanup sits with whoever is generating them.
The practical cleanup habit
There's no setting that makes macOS delete old screen recordings for you, so the only reliable fix is a periodic review — the same way you'd occasionally clear out Downloads. A few minutes every month or two, sorting your recordings folder by size or date and moving anything you no longer need to the Trash, keeps this from becoming a multi-gigabyte problem you only notice when your disk warns you it's nearly full.
If you've changed your save location as described above, this is quick: open the one folder, glance at file names and dates, and remove what's clearly served its purpose. If your recordings are still scattered across the Desktop mixed in with everything else, it takes longer, which is itself a good reason to consolidate them going forward.
Conclusion / VolumeLens tie-in
Screen recordings are a good example of a storage problem that isn't caused by any single bad decision — each recording feels reasonable in the moment, and it's only the accumulation over months that turns into real disk space. The fix isn't complicated, just easy to forget: know where your recordings are saved, and look at that folder occasionally.
We built VolumeLens because we needed exactly this kind of accumulation to be visible without having to remember to check. Point it at your home folder and folders like ~/Movies or your Desktop show up sized relative to everything else on your Mac, so a few forgotten screen recordings stand out immediately instead of blending into a wall of icons. You can see what else it surfaces on /features/ beyond video files — the same visual approach works for any folder that quietly grows over time.