Manatee

A GIF that will not play in Preview on a Mac

· 6 min read

A GIF will not play in Preview on a Mac because Preview is not built to play it. It opens an animated GIF as a stack of still frames, one per thumbnail, and no setting changes that. To watch the animation, select the file in Finder and press Space, or open it in Safari. If it stays frozen there too, the file has a single frame, was cut short, or is not really a GIF.

Why Preview shows frames instead of motion

Preview treats a GIF the way it treats a PDF with several pages: as a document made of separate images. Choose View, Thumbnails and the sidebar lists every frame in order. Clicking through them steps the animation by hand, and that is as close to playback as Preview gets.

This is useful for one job. To save a single frame as a still picture, select its thumbnail and drag it to the desktop.

Three ways to play a GIF on a Mac

  1. Quick Look. Select the GIF in Finder and press Space. The animation plays in a preview window. Press Space again to close it.
  2. Safari. Drag the file onto a Safari window, or right-click it and choose Open With, Safari. Any web browser plays GIFs.
  3. Photos. Drag the GIF into Photos. It plays when you open it, and Photos gathers animated images in the Animated album under Media Types.

Messages, Mail and Notes also play a GIF in place once it has been dropped into a message or a note.

To make a double-click play GIFs from now on, select any GIF in Finder, press Command-I, set Open with to Safari, and click Change All. Preview stays available from the right-click menu for the times you want the frames.

When a GIF stays frozen in every app

Work through these in order.

Animated images are paused across the system. On macOS Sonoma and later, open System Settings, Accessibility, Motion and look at Auto-play animated images. When it is off, GIFs in Safari, Messages and other apps hold on one frame until you play them by hand. Turn it on if you want them to move by themselves.

The file has only one frame. Open it in Preview and choose View, Thumbnails. One thumbnail means one frame, and a GIF with one frame is a still picture. This happens when a website’s save command grabbed a preview still instead of the animation, or when the GIF was resized or converted by something that kept only the first frame. The fix is to get the animation again from its source.

The file is not a GIF. Many websites and messaging apps label short looping clips as GIFs while delivering a muted video or a different image format. Saved with a .gif extension, such a file may show one frame or nothing at all. Terminal will tell you what it really is:

file ~/Downloads/clip.gif

A real GIF answers with GIF image data and its dimensions. If the answer mentions ISO Media or MP4, the file is a video: change the extension to .mp4 and it will play in QuickTime Player. If it mentions Web/P, it is a WebP image: change the extension to .webp and open it in Safari. Changed a file extension and now it will not open explains why the extension has to match the contents.

The download was cut short. A GIF that plays its first second and then freezes, or shows a frame that is only partly drawn, is usually incomplete. Compare its size with the original if you can, and download it again. A repair tool will not help here, and that includes Manatee: its Repair mode covers video, PDF and Word documents, not GIF images.

It plays once and stops. A GIF can carry a loop count. Most are set to loop forever, but some play once and rest on the last frame. Close it and open it again to watch it a second time.

When a video would serve you better

GIF is an old format. It has no sound, it is limited to 256 colors per frame, and its files are very large for what they show. If the animation is headed for a presentation, a message or a website that accepts video, an MP4 of the same clip plays in QuickTime Player, can be paused and scrubbed, and is usually far smaller. Why a GIF is bigger than the video it came from explains the difference.

Manatee converts in both directions.

  1. Open Manatee and choose Convert.
  2. Drop the GIF onto the window, or drag it onto the menu bar icon.
  3. Pick MP4. For the opposite trip, drop a video and pick GIF.
  4. Find the new file beside the original, which is never modified.

Everything runs on the Mac, with no upload and no account. Manatee is free for 24 hours with every feature, then $9 once. How to convert a GIF to MP4 on a Mac walks through the details, and how to convert a video to GIF covers the other direction.

The limits: Manatee is not an editor, so it does not crop, trim, caption or change the speed of an animation. And it cannot bring back frames that are not in the file.

Which fix fits which situation

  • You only want to watch it: press Space in Finder.
  • You want double-click to play it: change the default app to Safari with Change All.
  • It is frozen in Safari and Messages too: check Auto-play animated images, then count the frames in Preview.
  • Terminal says it is a video or a WebP image: correct the extension.
  • You need to put it in a slide or send it somewhere that takes video: convert it to MP4.
  • A website insists on a GIF and you have a video: convert the video to GIF.

Questions

Is there a setting that makes Preview play GIFs? No. Preview has no playback for animated images. Use Quick Look, Safari or Photos.

Why does the GIF play in Messages but not after I save it? Messages plays it in place. The saved file opens in Preview by default, and Preview shows frames. Press Space in Finder instead, or change the default app as described above.

How can I tell how many frames a GIF has? Open it in Preview and choose View, Thumbnails. Each thumbnail in the sidebar is one frame.

Does a GIF have sound? Never. The format has no audio at all. A clip with sound that was called a GIF is a video, and converting a video to GIF drops its audio.