As video editors with legacy formats have been keeping an eye on for several months now, Apple has finally updated its Final Cut Pro X (version 10.4.6) to as part of its transition to macOS technology (read more about why here).

While Apple has been warning about this for some time, it means that you’ll need to double check and make sure you convert all of your files and media based on QuickTime 7 codecs before you update to this latest version.

Let’s take a look at all the FCP X updates and bug fixes.

Final Cut Pro X 10.4.6 Update

FCP X Update

Along with the MacOS update, the FCP X 10.4.6 version update will automatically convert any QuickTime 7 based codecs to compatible 64-bit formats. However, once the new OS is installed, you’ll no longer be able to even open any unconverted files and will have to go through a tricky detection and conversion process outlined by Apple here.

Here is the full list of Video Formats compatible with the new macOS:

  • Apple Animation codec

  • Apple Intermediate codec

  • Apple ProRes

  • Apple ProRes RAW

  • AVCHD (including AVCCAM, AVCHD Lite, and NXCAM)

  • AVC-ULTRA (including AVC-LongG, AVC-Intra Class 50/100/200/4:4:4, and AVC-Intra LT)

  • Canon Cinema RAW Light2

  • DV (including DVCAM, DVCPRO, and DVCPRO50)


  • H.264

  • HDV

  • HEVC (H.265)

  • iFrame

  • Motion JPEG (OpenDML only)

  • MPEG-4 SP

  • MPEG IMX (D-10)


  • Uncompressed 8-bit 4:2:2

  • Uncompressed 10-bit 4:2:2

  • Uncompressed 10-bit "R10k"

  • XAVC (including XAVC-S)


  • XF-AVC

As well as all media formats which will be affected by the 64-bit transition.

  • 3ivx MPEG-4

  • AV1 / VP9

  • AVC0 Media AVA0 Media

  • Avid DNxHD / DNxHR

  • Avid DV / DV100 / JFIF / Motion JPEG

  • Avid Meridien / 1:1x / Packed / RGBPacked

  • BitJazz SheerVideo

  • CineForm

  • Cinepak

  • DivX

  • Flash Video

  • FlashPix

  • FLC

  • GlueTools codecs for Cineon/DPX, Phantom Cine, ARRIRAW, Uncompressed RGB

  • H.261

  • Implode

  • Indeo video 5.1

  • Intel Video 4:3

  • JPEG 2000

  • Microsoft Video 1

  • Motion JPEG A

  • Motion JPEG B

  • On2 VP3, VP5, VP6, VP6-E, VP6-S, VP7, VP8, VP9

  • Perian collection of codecs (such as Microsoft MPEG-4, DivX, 3ivx, VP6, and VP3)

  • Pixlet

  • Planar RGB

  • RealVideo

  • REDCODE QuickTime Decoder (.mov)

  • SGI

  • Sony HDCAM-SR (SStP)

  • Sorenson 3

  • Sorenson Spark

  • Sorenson Video / Video 3 / YUV9

  • Streambox ACT-L2

  • Windows Media Video 7, 8, 9

  •’s Theora Video

  • ZyGoVideo

The FCP X 10.4.6 update also includes several small updates and bug fixes including timeline display issues, missing files and audio hum removal. Motion (5.4.3) and Compressor (4.4.4) are also being updated to automatically detect the newly incompatible legacy formats and improved support for ProRes RAW and RAW HQ.