How Long Can You Screen Record on a Mac? Limits and File Sizes

You can screen record on a Mac for as long as you have free disk space. The Screenshot toolbar (⇧⌘5, Command-Shift-5) and QuickTime Player have no fixed time limit and keep recording until you stop them. At 10 Mbps, for example, an hour of video takes about 4.5 GB.

This page shows how to estimate file size per minute, how to check your space before a long session, and where the limits are in Screen Bolt. In Screen Bolt, recording length is unlimited, but exports from the free version are not.

How long can you screen record on a Mac?

The built-in tools have no fixed time limit. A recording started from the Screenshot toolbar, or from QuickTime Player with File ▸ New Screen Recording (which opens the same toolbar), runs until you stop it or the Mac can't keep writing it. Disk space usually runs out first.

The built-in tools save a raw .mov, and QuickTime offers only basic edits such as trimming. If you need zooms, a webcam overlay or cuts on a long recording, see how to edit a screen recording on Mac.

Screen recording file size on Mac, per minute

File size depends on bitrate (how much data each second of video uses). Bitrate in turn depends on the app, the resolution, the frame rate and the quality setting. No single "MB per minute" figure covers every Mac, but you can work it out quickly.

The quick math

File size = bitrate × duration. Divide megabits by 8 to get megabytes. Finder counts 1 GB as 1,000 MB.

Audio adds little. A 128 kb/s AAC track, which is what Screen Bolt exports, comes to about 1 MB per minute.

To skip the arithmetic, enter your resolution, frame rate and bitrate in our free video file size calculator.

How resolution changes the size

At the same quality, bitrate rises roughly with the number of pixels in each frame. That's why a 4K recording can be several times the size of a 1080p one.

Retina displays push this up. Screen Bolt captures at 2× the screen size in points, so on a Retina display set to look like 1440×900, the recording is 2880×1800. That frame has more than twice the pixels of 1080p. Recording a single window or a dragged area instead of the whole display captures fewer pixels. For more on high-resolution capture, see how to screen record in 4K on Mac.

Two other things add size:

• Frame rate. 60 fps writes twice as many frames per second as 30 fps.
• Cameras. In Screen Bolt each camera records to its own file alongside the screen recording. A camera set to 4K under Max camera resolution captures far more pixels than one set to 720p.

Measure your own setup

The most accurate estimate comes from your own Mac:

1. Record exactly 1 minute with the settings you plan to use (same display or area, frame rate and camera).
2. Select the file in Finder and press ⌘I (Command-I) to see its size. For Screen Bolt, select the .screenbolt project, which includes the camera files.
3. Multiply by the number of minutes you plan to record, then leave room for the export.

Screen Bolt projects are saved in your projects folder (~/Screen Bolt Projects by default). Recordings made with the Screenshot toolbar go wherever its Options menu says, which is the Desktop by default. If you can't find one, see where screen recordings go on Mac.

Check your free space before a long recording

1. Open System Settings.
2. Click General, then Storage. You can also type "Storage" in the System Settings search field.
3. Read the available space at the top. Terminal gives the same information. This command shows the size and free space of the volume that holds your files. Read the Avail column. The command only reads information and changes nothing:

df -h /System/Volumes/Data

Plan for more than the recording itself. You need room for the raw recording plus the exported file, and macOS needs working space of its own.

How Screen Bolt warns you about disk space and dropped frames

Screen Bolt shows warnings at three points, so a space problem is less likely to catch you halfway through a long take.

Before you record. Screen Bolt checks that the output volume has room for 60 minutes of recording at its estimated bitrate. If it doesn't, the recording won't start, and you see: "Not enough free disk space to record safely. Need at least <X> available, only <Y> free on the output volume. Free up space and try again." This check runs before every recording, so a nearly full Mac can block even a 2-minute take.

While you record. If space gets low, an amber banner shows how much is left and says "Recording continues; consider stopping soon." Stop at a natural break instead of letting the disk fill up.

After you record. If the Mac couldn't keep up, an amber banner reports dropped frames for the video, system audio and mic tracks. It gives the likely cause as "slow disk or thermal throttle." A separate note warns when the microphone timeline has breaks, which can sound like brief clicks.

During recording, Screen Bolt writes the raw files to the macOS temporary folder and moves them into your projects folder when you stop. If you moved the projects folder to another drive (Settings ▸ Recording ▸ Save new projects to), plan for space on both the startup disk and that drive.

Screen Bolt free version: unlimited recording, 3-minute exports

Recording length and export length are separate limits in Screen Bolt:

• Recording: no time limit in the free version or Pro.
• Free exports: up to 3 minutes, 720p maximum, a "Made with Screen Bolt" watermark in the bottom-right corner, and no GIF export.
• Pro: no export length limit, quality up to 4K or Original, no watermark, and GIF export. As of November 2026 it costs $79 as a one-time purchase (see pricing).

There's no timed trial. The free version doesn't expire. Only its exports are limited.

A few things to know about the 3-minute cap in version 1.11.5:

• Trimming doesn't get you under the cap. The export sheet measures the full recording length, not the trimmed result. A 10-minute recording cut down to 2 minutes is still refused with "Recording Too Long for Free Export". In the free version, keep each recording under 3 minutes from the start.
• Quick export fails without a message. If After recording is set to Export to file and a free recording runs over 3 minutes, no file appears and no error is shown. Open the project and export from the editor to see the reason.
• GIF exports have their own limits (Pro). Clips longer than 60 seconds are refused. For clips over 15 seconds, Screen Bolt asks before exporting.

The export sheet shows an estimated file size before you export ("~<size> • <duration> • <W×H> (estimate ±30%)"). Use it to check that the export will fit on the disk. The Compression setting (Settings ▸ Quick export) changes the export bitrate. Studio is twice Social Media (the default), Web is half, and Web (Low) is a quarter. MOV exports use HEVC, which targets about three-fifths of the MP4 (H.264) bitrate at the same setting. The MP4 vs MOV guide covers that trade-off.

Tips for recording an hour or more

• Do a 1-minute test first, multiply its size, and check that the disk has that much free plus room for the export.
• Plug in a MacBook so a flat battery can't end the session.
• Record less screen. A single window or a dragged area captures fewer pixels than a whole Retina display.
• Use 30 fps when motion doesn't matter. In Screen Bolt, Settings ▸ Quick export ▸ Frame rate also sets the recording frame rate. 30 fps halves the frames the Mac has to encode and write, which can also help if you see dropped-frame warnings.
• Lower the camera resolution under Max camera resolution if the webcam bubble will be small in the final video.
• Pause instead of recording dead time. Paused time isn't in the recording, and Screen Bolt keeps the screen, cameras and cursor in sync across pauses. See how to pause a screen recording on Mac.
• Stop before you quit. In 1.11.5, quitting Screen Bolt during an active recording quits without finalizing it.
• Split very long sessions into sections. Shorter files export faster and are easier to trim, and one problem doesn't cost you the whole session.

If a long recording fails

Screen Bolt won't start a recording. If the red banner shows the "Not enough free disk space" message, free enough space for 60 minutes of recording and try again. Emptying the Trash and moving old projects off the startup disk are usually the quickest ways to do that.

The recording stopped partway. Screen Bolt shows "Recording stopped: the writer failed (<reason>). The output file may be truncated." or "Recording stopped unexpectedly: <error>." Check free space first. Then work through why Mac screen recordings stop by themselves.

Dropped frames or crackle after a long take. The disk or the Mac couldn't keep up. Close heavy apps, record a smaller area, switch to 30 fps, and let a hot laptop cool down. More fixes are in choppy or laggy screen recording on Mac.

Screen Bolt quit or crashed during a recording. Screen Bolt deletes leftover temporary recordings the next time it launches, so save them before you reopen the app. This command opens your temporary folder in Finder:

open "$TMPDIR"

Copy any files named ScreenBolt_<timestamp>.mov (and ScreenBolt_webcam_… for camera footage) to another folder. A file that was never finalized may not open. If it does, open the copy in Screen Bolt with File ▸ Open project.... A video opened this way has no cursor data, and edits to it aren't saved as a project. If Screen Bolt is still running, File ▸ Recover unfinished recordings... opens the newest one directly. More options are in how to recover a lost screen recording on Mac.

A free export is refused even after trimming. This is the full-length check described above. Re-record in parts under 3 minutes, or upgrade to Pro.

FAQ

How much storage does an hour of screen recording take?

It depends on the bitrate: about 2.25 GB at 5 Mbps, 4.5 GB at 10 Mbps and 18 GB at 40 Mbps. Retina-resolution capture and 60 fps push the size up. A 1-minute test on your own Mac gives the most reliable figure.

Does the Screen Bolt free version limit how long I can record?

No. Recording is unlimited. Exports from the free version are limited to 3 minutes at 720p with a watermark, and GIF export needs Pro.

Is QuickTime better for very long recordings?

QuickTime and the Screenshot toolbar have no fixed time limit and give you a raw file, which is fine if you just need to archive a long session. Screen Bolt adds disk space checks before and during recording plus a full editor, but its free version only exports recordings under 3 minutes.

If your long recordings need zooms, a webcam or cuts afterward, you can download Screen Bolt free and try it with your setup.