uodated to 10.5.1 now logic won’t start

Hey everybody,

I have a solution that worked for me.

Quick answer:

I deleted all plugins that ended with 'x64' from the Components folder (HD>Library>Audio>Plug-Ins>Components)

In my case they were:

• Nexus x64.component
• Quartz x64.component

And it worked! Although it still takes about 1/2-2 minutes to load Logic every time. Before the update it was only a matter of a few seconds. Which means Apple still has to address the lengthy plugin rescan process on every single launch with this new 10.5.1update.

How I figured out that those files were bricking my Logic?

I used the following algorithm:

• I emptied the bin before proceeding.
• I created a reserved copy of Components folder.
• I emptied the content of the original Components folder.
• Then I started to RightClick=>'Put Back' every single plugin 1 by 1 from the Bin which was automatically added back to the original Components folder
• I was restarting the system with every single add.
• Launch Logic Pro
• Sometimes I sped up the algorithm by combining the less likely suspicious plugins from the same developer eg. Soundtoys, FabFilters, Arturia, Native Instruments - I batch 'Put them Back'
• Tagged all non-problematic plugins with various colours. Just in case I had to start over and I'd already know that those plugins could have been safely put back in the Components folder.
• I obviously suspected DIY and Trial plugins to cause the problem. But in the end I found out that my brickers were the files with x64 in their name.
• It took me 4 hours to achieve the result. I had to process 229 plugins in total.

Hope this helps!

Thank you.

PS.

My set up:

MacBook Pro (Retina, 15-inch, Late 2013)

Catalina 10.15.4

iLok 2

I have a lot of DIY, freebie, lite, expired trials, no longer supported plugins

I don't have any illegally acquired or 'cracked' plugins installed

That also worked for me.

• Delete AU cache
• (Restart Logic and maybe you can already see which plugin can't be scanned.)
• Move all AU's to an external folder, so logic should be able to start now.
• Drag them back to the AU folder (not more than 20 at a time) and restart Logic.
• As soon as logic doesn't respond anymore after restarting it you might have found the incompatible Plugin (In my case it was Amplesound J Bass that was working in 10.5.)

Good Luck!

Seems like DUY plugins are the culprit, i've gotten errors with them before because sometimes you don't see the little "OK" button to click to proceed on a big screen . I removed them and logic starts fine. Also the Loudness Penalty plugin crashes 10.5.1.

Ok, I found a way to finally open Logic 10.5.1. If you move all the .components to another folder, so that it there are no more .components in the 'Components' folder, then Logic should open. You don't have access to your 3rd party plugins, but that's the compromise right now, until Apple fixes this.

I had the similar issues...

This worked for me:

I deleted the Audio Units Cache:

https://www.youtube.com/watch?v=DTtK6oIk5vk

Then I did a rescan. I still had some popup windows with error messages of pug-ins which wouldn't load. Each time I clicked "cancel", they came up again.

Then I went to Preferences-> Security -> General.

There I could allow each Plug-In with Error Messages to load and then Logic would start again.

Maybe it helps for you as well...good luck!

I’m back on Logic 10.5.1. I also deleted the AU Cache and I also deleted the com.apple.logic10.plist file in the Go/Library/Preferences Folder.

I tossed the AU components that I knew were old junk (even an old VST) and then copied many of the rest of them to a desktop folder before sending them to the trash. Eventually Logic made it through the plug-in scan.

I finally got Logic 10.5.1 to start up without any BS.

First try this.

Delete your AU cache (user- Library--Caches-AudioUnitCache

and the logicx preferences. ( user-preferences)

rescan all plug ins.

the problem is a incompatible AU Plug

I had to do this a few times and also drag/copy any questionable plug-ins(such as older versions of your VI Audio Units to a folder on the desktop and then send them to the trash. Logic now apparently has a **** of a time figuring out how to straighten things out on its own but it may give you a few hints. It looks like it might have been the Audio Units for VE Pro 5. I’m not sure though. It’s probably not an actual bug that was introduced in Logic 10.5.1 but a new weakness.

I tried this and Logic still crashed.

I went to a back up where I had Logic 10.5.0 and I just replaced the app in the applications folder and... it worked.

Thanks for your help but going back to the older version worked for me.

I'm sorry, friend. I feel your pain. Sounds like we had the exact same issue as well with the iLok Trial plugins... One person here said they did something that worked fro them (but did NOT work for me.)

That was to delete the plugin cashe file and force Logic to completely rescan all plugs from scratch.

When you do this, you will be in another long loop of waiting - but for that one user, they were up and running.

To try it, do this:

In the Finder - "Go" pull down menu - Library - Cashes - AudioUnitCashe - Remove the file(s) here and put them in a folder elsewhere.

Now the AudioUnitCashe folder is empty and start Logic...

Again, this did not work for me but it's something to try.

Possible Workaround that worked for me.

I moved everything out of my Hard Drive - Library - Audio - Plug-Ins Folder and saved it somewhere else. Logic 10.5.1 started immediately, no audio unit scan. smdh. I have no audio units in my User Folder - So this worked for me.

Gonna put back the components now and see if it still works - *Fingers crossed*

it popped up for me immediately , no waiting. Maybe you're not removing enough. I cleared out my components folder completely first, then added by First letter , batch by batch til i found the culprit.

Yes try it again , it popped up immediately for me as i moved ALL of my components out of the folders. Check both your System and User plugin folders.

Apparently there will probably not be an Apple fix for this issue, at least anytime soon. One can only attempt to find out which plug-in(s) might be putting Logic into an infinite loop. I and probably everyone else also got the beach ball with the "verifying plug-ins" box. It comes down to Logic 10.5.1 choking on plug-ins that are either obsolete or need updating.

Your best bet is to find the AU plug-ins folder and copy all of them to a separate folder on the desktop for safe keeping. Then put all the AU plug-ins that are in the original Logic AU plug-ins folder in the trash. Now you should be able to load Logic. You’ll then need to move one or a few of the AU plug-ins that you saved to the desktop AU plug-ins folder back to the Logic AU plug-ins folder and keep reloading Logic until you find which AU plug-in(s) is causing the problem.

https://support.apple.com/en-us/HT201532

The Solution is to leave LPX to open. It will beachball for a while but rectify itself.

I freaked aswell but it just took a little patience.