OSStatus error -50 LOGIC PRO

Question

Level 1

4 points

OSStatus error -50 LOGIC PRO

Hello,

I’ve installed the UA (Universal Audio) plugins in Logic Pro. However, whenever I open a new project and try to load a different plugin or virtual instrument, I get the following error: "OSStatus error -50."

I have both UA Connect and iLok installed and running.

Interestingly, the default synthesizer works fine, but none of the other instruments load properly.

Any ideas on how to fix this?

For context: I’ve already reinstalled Logic and the plugins, but the issue remains.

Best Regards

MacBook Pro 13″, macOS 26.0

Posted on Oct 6, 2025 1:43 PM

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Answer 1

yoyoBen

Level 4

3,341 points

Oct 7, 2025 12:18 PM in response to Bachuso

What "default synthesizer" are you talking about?

Are your macos, uad, ilok and logic versions up-to-date?

You may read this:

https://help.uaudio.com/hc/en-us/articles/41351505627028-UAD-Software-Compatibility-with-macOS-Tahoe-26

If that doesn't fix your issue, I would contact UAD support/forum.

You can also look in the Console > Crash Reports to get some hints.

BTW, I avoid installing a new operation system on my computer. I always wait until the first bugs disappear.

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