Logic Pro X not starting up.

Having this same issue, on a brand new mbp. Had downloaded Logic Pro on this new device after running it on an imac since 2014. Managed to get a new session opened ONCE and even got an audio file loaded in, but the audio would not play. After quitting out of that session, same issues, all commands greyed out, new session unable to open. Critical failure. Really hope this gets sorted asap, kind of embarrassing for this to happen on a new device with flagship, apple-made software.

I had the same issue. I eventually got Apple Support involved and ended up having to wipe my computer. My best guess is that it's a framework issue that's popped up with the most recent update. I'd try a fresh reinstall of the OS, and if that doesn't work, you may have to wipe. Seems like the only way it's gotten resolved. Apple doesn't know about an issue internally with the latest build causing issues.

So I have found the source of my issue

It's the Logic Pro, Apple Sound Library.

Despite promising you that you can relocate it and even providing a handy menu item to enable you to do this, Logic will not accept its Sound Library being on anything other than my startup disc. Anything other than this causes Logic to either provide an error message saying it can't find the library (because I have had to disconnect the external HD it was on) or it just crashes disgracefully.

My solution has been twofold.

Having had to to redownload the application, remove all my peripherals and install them one by one (to ensure that they weren't the issue, despite working perfectly with every other audio application I use), remove and install all my many plugins one by one (because why would they work perfectly in every other audio application and yet cause Logic to have issues eh), I've installed the absolute minimum Apple Sound library on my startup disc. So that's 33Gb of stuff Logic says I need, but won't let me put where I want it to go.

I'll not be downloading any of the optional Sound Library stuff. Apple's internal HDs are expensive and fragile enough that I don't want to risk any of Apple's own stuff giving me more problems.

So after two days of troubleshooting only to find out that it's an Apple issue, I've sorted it out and Logic actually deigns to load on my £3,500 Apple computer.

I'm thankful because it means I can actually load all the work I've done over the last few years and move it to an Audio application that might actually be expected to work reliably.

Hope this helps

Same issue.

New Mac Studio that now can't even launch its own software.

Tried everything in their 'help' page If Logic Pro for Mac isn’t working – Apple Support (UK)

None of this works.

All my other music software, Ableton 12, Luna etc work perfectly.

And they call this is a 'pro' application

My issue persisted when I created an entirely new user and only ever opened Logic on that account. It would just crash with no indication but a report that I could send to apple. They must be heartily sick of my reports by now, there have been so many.

I had to disconnect everything and start Logic with command-shift pressed to even get it to open. But eventually it did and told me the sound library was missing (because it was on a non-connected external HD). And that helped me finally locate the issue.

Did you ever figure out a way to get Logic to start up? I still haven't been able to figure out what's wrong, despite following all the help steps listed here. Desperately need a fix for this.

same here, bought a m2max couple months ago, moved all my data from 2020 intel Macbook, had 1 session opened and never been able to open something again, I deleted Logic and re-installed, nothing has changed, this is weird. All other apps are working great. Can the devs do something?

Thanks mate,

followed your instructions, nothing has changed.

Seems like issue is coming from something else.

Hope we find a solution asap

Cheers

Thanks for your reply @Lionzinho

I can not relocate my library because all options are greyed out except reinstall library and that doesn't work

I'm wondering if I need to completely erase my HD and start over again :( That would be a load of work.

Sounds like a cache issue. Quit Logic

Goto your user library in the finder by holding down the option key and clicking on the GO menu. You will then see LIBRARY. Click on that.

Open Cache

Delete com.apple.musicapps

and com.apple/logic10

Close window , restart your mac and relaunch Logic.

Hope this helps.

Thanks for the suggestion, but unfortunately no change. Really confused as to what could be the issue since this is happening on a brand new macbook pro. literally the first app I downloaded and unusable. So frustrating.

I too have exactly the same problem, I'm at the end of my rope, I've been trying to resolve the problem for several days, I've already tried everything.

I can't work anymore?

Did anyone resolve the issue?

THANKS

In my experience, trying to open Logic in a new user account (even an admin account) does nothing. This is one of the steps in Apple's help guide for resolving issues with Logic that I linked in a previous post, but unfortunately none of those seem to work.

And another thing.

Avoid to "migrate" data (especially system, library, plugins, applications...) from an old computer to a new computer with another macos. You can migrate documents, desktop, logic projects and audio files, though.

Hey I appreciate your suggestion; like I said, I already tried this (it is one of the steps that Apple has listed for troubleshooting logic) and it did not work.

As to your other suggestion, I am attempting to get Logic to run on a brand new macbook pro. I have not migrated data over from my previous iMac. Let me know if you can think of anything else that could be causing this issue!