Best frame interpolation software for Mac
Smoother motion, or slow motion that does not judder, by generating the frames between the ones you shot. The Mac field is thinner than the Windows one — here is what actually runs, including the tool you may already have installed. One entry is ours, labelled.
Two things that catch people out
Flowframes does not run on macOS. It is the best-known free RIFE interface and it is Windows-only. A lot of Mac users find the project, read the instructions and only then discover there is no build for them.
Topaz no longer sells a perpetual licence. It retired buy-once pricing in late 2025 and Video AI is subscription-only now, around $299 a year. If you came looking for a version you could simply own, that is why.
Try what you already own first
Frame interpolation is built into editors, and people forget. The free version of DaVinci Resolve includes Optical Flow as a retime process — real motion-estimated interpolation, at no cost. Final Cut Pro has its own optical flow retiming too.
It holds up well down to about 50% slow motion. Below roughly 25% you start seeing ghosting, warping and unnatural movement. Resolve's better engine, Speed Warp, is Studio-only, so on the free version optical flow is your ceiling.
If you already edit in either app, test it on your clip before buying anything. For moderate retiming it may be the end of the story.
The options
DaVinci Resolve (free) — Optical Flow
Free, capable, and probably already installed if you edit video at all. Best for moderate slow motion inside an edit you are doing anyway. Weakest on extreme retimes and on converting a whole clip's frame rate as a standalone job.
REAL Video Enhancer — free, open source
Free and open source with native Apple Silicon support on macOS 14 and later, and the most direct free answer to "I wanted Flowframes but I am on a Mac". Rougher than the commercial tools, and none the worse for the price.
rife-ncnn-vulkan — free, command line
The RIFE engine itself, driven from a terminal. Free, scriptable, no interface. If you are comfortable writing a shell loop this is the most direct route and there is nothing to buy.
Topaz Video AI — subscription
The most capable tool in the category by some distance: interpolation plus upscaling, denoising, stabilisation and face recovery, on Mac and Windows, with several interpolation models. Now subscription-only at roughly $299 a year. If you need the restoration toolbox, it earns that.
Lifetime-licence suites — UniFab, Aiarty, VideoProc
A cluster of Windows-first video suites that sell perpetual licences and have appeared heavily in "Topaz alternative" lists since the pricing change. Prices range widely. Check Mac support specifically before buying — it varies, and it is not always the headline feature set that runs on macOS.
Interpolate — ours
Disclosure: we make this one. RIFE running entirely on your Mac, 2× or 4× the frame rate, up to 4K, MP4/MOV/M4V in and HEVC out, with a batch queue. It also does video upscaling. £39 paid once, perpetual, with a free tier that does 2× at up to 1080p with no watermark.
Do not buy it if Resolve's Optical Flow already handles your retimes, or if you need denoising, stabilisation and face recovery — that is Topaz's job and we do not pretend otherwise.
When interpolation looks bad — and why
No tool in this category is magic, and the failure cases are predictable. Interpolation rests on optical flow, which assumes a pixel changing between frames has moved. Two things break that assumption:
- Violent lighting changes. Strobes, flashes and lasers make a pixel change because a light fired, not because anything moved. Flow estimation has no way to tell the difference.
- Too much motion, or too much of it at once. Fast camera movement, or a dense crowd of hundreds of independently-moving subjects, gives the estimator competing answers.
We measured this on real strobe-lit concert footage: in the hardest section, generated frames swung to roughly three times the frame-to-frame motion of their neighbours while the real frames stayed level. Played back, that reads as the motion stalling and then lurching — the thing people describe as "it goes slow in the middle".
Practical advice, true of every tool here: prefer 2× over 4× on difficult footage, since there is half as much to invent. And judge any of these on your hardest clip rather than a clean one.
Side by side
| Tool | Cost | Mac | Best for |
|---|---|---|---|
| DaVinci Resolve (free) | Free | Yes | Moderate retimes inside an edit |
| REAL Video Enhancer | Free, open source | Yes (14+) | The free Flowframes substitute |
| rife-ncnn-vulkan | Free, CLI | Yes | Scripting and automation |
| Flowframes | Free | No | Windows only |
| Topaz Video AI | ~$299/yr | Yes | Restoration toolbox, pro work |
| Interpolate | £39 once | Yes | Owning it; smoothing and upscaling |
Checked 27 September 2026. Prices move — verify before buying, and tell us if this is stale.
How to choose
- You already use Resolve or Final Cut — try optical flow first. Free, and often enough.
- You want free and standalone — REAL Video Enhancer, or the RIFE CLI if you script.
- You need denoising, stabilisation or face recovery too — Topaz, subscription and all.
- You want to own a native Mac tool that does this one job — Interpolate, and there is a direct comparison with Topaz if that is the decision you are making.
Questions
Can I use Flowframes on a Mac?
No. Flowframes is the best-known free RIFE interface, but it is Windows-only and there is no Mac build. Plenty of people search for it, find the project, and hit a dead end. On macOS the free equivalents are REAL Video Enhancer, EncodeGUI, or the rife-ncnn-vulkan command line directly.
Do I already have frame interpolation?
Quite possibly. The free version of DaVinci Resolve includes Optical Flow retiming, and Final Cut Pro has its own optical flow option. Both do motion-estimated interpolation. If you already edit in either, try that before buying anything — it costs nothing to test.
How good is Resolve's Optical Flow compared to a dedicated tool?
Good down to roughly 50% slow motion. Push to 25% or below and ghosting, warping and unnatural motion start showing. Resolve's better engine, Speed Warp, is gated behind the paid Studio version, so on free Resolve optical flow is the ceiling.
Does Topaz still sell a perpetual licence?
No. Topaz retired perpetual licensing in late 2025 and Video AI is now subscription-only, at around $299 a year or $59 a month. That single change is why most searches for alternatives in this category exist at all, and why lifetime pricing is the thing people filter on.
How long does interpolation take?
Longer than the clip. Every output frame is generated, so it scales with resolution, length and factor. On an M-series Mac, a minute of 1080p footage at 4× is roughly half an hour of rendering. Queue it and come back — this is not a real-time operation in any tool.
When does frame interpolation look bad?
When motion between frames is large, or when lighting changes violently. Strobes and flashes break the brightness-constancy assumption optical flow depends on, and dense crowds give it hundreds of competing motions. Expect artefacts on concert footage; expect good results on steady camera moves.