There's a bad batch export bug with Final Cut Pro, Compressor and macOS Monterey.

Let's first up say that Monterey has been the flakiest macOS that we have used for a long time. Although Final Cut Pro seems to work ok, we get general freezes, beachballs and the odd random restart. (This is without mentioning Safari!)  Only this morning we had to do a reboot as a machine had refused to wake up from sleep. Not impressed.

So when we received this information from an FCP.co reader, we thought it was worth sharing.

'Basically, if you submit a batch export from Final Cut Pro X to Compressor, it will usually, though not always, have every video in the batch fail out with “Unknown Error -9074”.

'Prior to experiencing this error for the first time in October, there was almost nothing about this error on the internet. Now there are numerous posts on Apple’s support site, where people are getting the same error although no one seems to know what it means.

fcp batch compressor bug 02


Apparently Apple is aware of it but the issue persists. And yes, I’m not a dummy, I’m cautious when upgrading to a new macOS. I have two systems and I always update one of them first, use it for a couple of weeks and once I find the system to be stable, I update the other system.

In this case, the only thing I hadn’t tested was batch exporting from Final Cut to Compressor and, well, it got me lol. I should add - if I have say 30 mp4s that I need to transcode to ProRes, Batch Exporting in Compressor works fine. It’s something about when you send a project from Final Cut to Compressor that the issue occurs.'

So a word of warning here, if you are using Monterey you might experience the same problem. We believe it might only affect Intel based Macs, please leave a comment below if you know otherwise or have any more information to add.




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I am the Editor-in-Chief of FCP.co and have run the website since its inception ten years ago.

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jamecude's Avatar
jamecude replied the topic: #119137 22 Feb 2022 18:30
Hi, Peter. I only see this error when I try to Send to Compressor from Final Cut Pro. I've been able to successfully avoid the error by using a Compressor Setting as a Share Destination instead of Send to Compressor.
joema's Avatar
joema replied the topic: #119138 22 Feb 2022 18:38
Peter, thank you for giving visibility to this problem. On 24 Jan I discussed this with Pro Apps support and demonstrated it during a remote support session. I then filed the bug using the Mac Feedback Assistant app (what replaced the previous Bug Reporter app used by developers). See below.

Sometimes an OS update can expose a bug in an app, and it can be ambiguous whether the system or app layer is responsible. However this bug is in a very common procedural path. My former product manager would have had our hides if we allowed something like this to ship.

Title: Compressor transcode hangs followed by error -9074 on x86 Monterey if FCP batch contains titles

Description: If a new batch is sent from FCP to Compressor which contains a clip with titles, then that batch is started using a built-in export preset such as ProRes 422, if on x86 Monterey, Compressor will frequently hang during transcoding then after about 4 min 30 sec system error -9074 is raised. This is unique to x86 and Monterey and does not happen on Apple Silicon or x86 prior to Monterey. The failure is consistently reproducible and persists after FCP and Compressor are removed and re-installed and if using a new MacOS user account.

Reproduced using FCP 10.6.1 and FCP 10.5.3, Compressor 4.6 and 4.5.4 on x86 Monterey 12.1.

Spindump indicates the failure happens within about 1/10th CPU sec and most threads get stuck on synchronization objects.
gaddster's Avatar
gaddster replied the topic: #119175 24 Feb 2022 11:53
Its been driving me mad.. I only export single items and since November compressor' is unusable with the 9074 error problem.. I have even tried exporting a basic clip with no titles and get the same .. Thanks for highlighting this issue and hopefully apple repair it quickly