P: LrC 12.2.1 fails to start/launch or is extremely slow launching.

@Ana Martinez and @lewisfrancis29425732, if Adobe's on its normal schedule, we should expect to see a new version of LR this week or next. You might wait to see if that new version addresses your issue, and if not, start new threads describing your problems. Your posts here are buried in a thread about "metrics.json", which may have nothing to do with your problems.

I've had a new MacBook Pro 13" running on an M2 chip with MacOS 13.2.1 Ventura for a couple weeks now and I am unable to even start Lightroom Classic.

I've done every single recommended thing, clear the preferences, wipe the Adobe Cloud completely off the drive, uninstall and reinstall everything about 10 times but to no avail. Disk access etc. has also been given to LrC as per recommendations...

When I open LrC (doesn't matter if via icon or through the Adobe Cloud app) it goes straight to a seemingly blank application which is unable to do anything and I can't close the app normally, I have to force quit it.

I've been to the Genius Bar with the device and Apple has assured me nothing is wrong with the computer, so it has to be an Adobe issue!

While at Apple we tried setting up a test user profile and weirdly we were able to open the app there but not in the actual user profile.

Please help, otherwise I will cancel my subscribtion.

Attached a screenshot of what it looks like when I try to open LrC...

My Lightroom classic version 12.2.1 will not open it will appear in task manager this started Apr 15 it worked for the morning with the afternoon stopped working and I've tried:

Opening Lrc holding down shift-alt, to disable preferences

Uninstalling and reinstalling Lightroom classic

Disabling GPU support for LrC

Holding alt click when opening Lrc to select a new catalog but when I do so it says catalog not responding and doesn't even load that screen. 

When I try to close it it will not respond until my computer has to force it to shut down. When I went to the (Windows \Users\[user name]\Pictures) I did not find my Photoshop catalog data instead I found it in my OneDrive.

I think it might have to do with the fact that some reason the files for my Lightroom might have ended up in my OneDrive for Windows rather than in my user data folder so when I was trying to disable One Drive since I don't use it it might have interfered. 

Any suggestions on how to resolve this issue?

What fixed it for me is:

Simply switching off the reporting of Lightroom usage back to Adobe, as @johnrellis describes in step 1.
THANKS for that!!

Thanks, I did a restart before looking for the file just to make sure there weren't any zombie processes still left running that might prevent the metrics.json file from being written. Nothing. Being a cached file, I couldn't even find it in my Time Machine backups to see if it was an unexpectedly large file. 

Prior to finding this thread, I went through all the troubleshooting recs, making sure LR had proper permissions, removing any plugins, attempting to reset prefs, etc. before I opted for the muclear option of clean installs of all things Adobe (keeping the prev mentioned catalog files). There's something about my account that LR no longer likes -- if I create a new account LR launches w/o problem. I really don't want to migrate everything over to a new account if I don't have to, especially if this is likely to happen again. 

I recently had a new SSD Drive installed on my PC runnung Windows 10. Consequently I had to re-install all my programs, including Lightroom and Photoshop. When I launched Lightroom Classic it intitally attempted to open the last catalogue I had used just a few days before on thhe old hard drive but then it froze. I left it overnight thinking it might just be the size of the catalogue (I think there are around 10,000 photos) but next morning still nothing had happened so I closed it down using Task Manager.

I read that a 'lock' file where the catalogues are located can sometimes cause Lightroom not to open if it hadn't been shut down properly so I removed that, but Lightroom would still not open. I then tried uninstalling it and re-installing it but it still wouldn't open. I now get a blank dialogue box which asks me to select a catalogue, but still nothing happens and a message at the top of the dialogue box tells me that Lightroom is not responding.

Both Photoshop and the non-classic version of Lightroom both open ok.

Hi John,

yes, I followed all the instructions step by step and had no problems in completing them. I found the metrics.json file where it should have been and deleted it. The problem is that it reappears every time I launch LrC again. The start screen would flash up for like one second and I can see in the Lightroom folder that the metrics.json file is created again in the very same moment. The feedback options in my account are duly deactivated. I did all this like 10 times and even reverted to older versions of LrC, no change.

@lewisfrancis29425732, "This is after removing all Adobe apps and files other than those catalog-related, and reinstalling."

Did you restart your computer before looking for "metrics.json"?  That ensures LR isn't running in background without its main window showing.

@Marcos26041109tjmy, did you follow these exact steps?

https://community.adobe.com/t5/lightroom-classic-bugs/p-lrc-12-2-1-fails-to-start-launch-or-is-extremely-slow-launching/idc-p/13695275/page/6#M41952

This is after removing all Adobe apps and files other than those catalog-related, and reinstalling.