Logic Pro X Rosetta Bug - Takes 10 minutes to Launch App

I'm running an M1 macbook Pro on Sonoma 14.5 and for the last few weeks there has been a bug opening Logic Pro X in Rosetta. It will open natively with no issues, however when I try to open it in Rosetta the dock icon will bounce for about 3 minutes and then nothing will happen for another 5-7 minutes, then eventually Logic Pro X will open in Rosetta. I need the Rosetta mode feature to continue utilizing certain third party plug-ins that haven't transitioned to silicone, but I can't wait 5-10 minutes every single time I want to launch Logic Pro X. Does anyone know of any plans to fix this bug?

MacBook Pro 16″, macOS 14.5

Posted on May 28, 2024 1:16 PM

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5 replies

May 29, 2024 2:03 PM in response to morozco

I've been told by the app developers that everything has been updated to work with apple silicon, but that the problem with ARA transfer specifically rests with Logic. I guess under Apple silicon, plugins don't run in the host (Logic), they run isolated from it, and thus the communication method that ARA2 requires between the plugin and the host isn't available. Celemony said it's up to Apple developers to sort out ARA implementation natively. Any idea if this is in the works? Vocal apps like Melodyne and Vocalign won't function in ARA mode. They still work in transfer mode, but for larger project files that method can be incredibly time consuming.

May 30, 2024 7:44 AM in response to BenB

The standard app does run natively but the Audio Random Access version (ARA) which allows for instantaneous transfer of data (instead of having to wait for the app to scan audio information in real time while the project plays) does not. This is the rest of that quote from their website:


"Melodyne 5.2 runs natively on Macs with Apple Silicon processors. In the case of ARA operation in Logic Pro, however, there’s a special point to bear in mind:

When Apple Logic Pro is running natively on Apple Silicon, it loads Audio Unit plug-ins outside Logic's own process space. This is actually an important advantage for users, as it prevents Logic Pro from quitting whenever a plug-in crashes. Unfortunately, although this method of hosting AU plug-ins enhances stability, it does not yet fully support third-party extensions like ARA."


It's not the end of the world to not be able to use ARA, though for larger projects it can save several hours worth of work. As Apple Silicon is the only operating system that currently has this issue, I'm curious if there are plans to address it in a future update. It would be incredibly disappointing to have the only two options be "don't use ARA versions of plug-ins" or "learn a different software that is ARA compatible".

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Logic Pro X Rosetta Bug - Takes 10 minutes to Launch App

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