MacOS Ventura login items list limited to 3

Create a new user account for testing. Try to add 4 or more Login Items there.

I just tried this on my own system and I was able to add more than 3 items. The size of the list expanded with each new item after 3.

You may have a corrupt preferences file, which can be easily corrected. I recommend adding the login items that you want in the test account. If it works there, then you can just copy over that preferences file. In the meantime, I will try to track down exactly what file that is. Hopefully someone else will beat me to it.

Adobe tends to do things their own way. Their apps may not be recognized as apps by this Login Items window.

You could try write a little Automator script that launches them. The Login Items tablet should recognize these scripts. You may not even have to save them as applications, but runnable application scripts would definitely work.

PAK0 wrote:

It remains really weird, all Adobe app have the .app extension so that is not different.

That's just 4 characters. What's inside is what is important.

Writing an automator script: well yes I'll look into that but I assume the preference panel in MacOS is just that:-)

It is less than that, I'm afraid.

An Automator script isn't too hard. You can use the older "Script Editor" too. It could be something as simple as:

tell application "Adobe Photoshop"
   activate
end tell

I don't have Photoshop so that name may be wrong, but that's all you need.

Any Third Party Applications that will interfere with the normal operation of the OS,  is an invitation for disaster and comprise the Operating System

Certain Applications maybe available on the Apple Apps Store - this only means the Developer is prepared to pay Apple a portion on each sale. What the Application may do to the computer is up to the User to check this out before purchase

Any of the below should be removed as per Developers Instructions 

This will include CleanMyMac

Read some of the posting and arrive at your own conclusions.

Specific to CMM ( CleanMyMac ) aka " BrickMyMac "

Some Contributors suggest restarting in Recovery Mode and choosing to Reinstall the Operating System over  the existing installation. 

This may or may not replace elements of the Entire Operating System including the Home Folder ( User Account )  and replace any corrupted or removed elements of the Operating System and make thing right.

Then there are Other Contributors ( like myself ) would suggest  from this link Use Disk Utility to erase a Mac with Apple silicon.

For Intel computer >> Use Disk Utility to erase an Intel-based Mac followed by How to reinstall macOS

Thereafter to start from scratch and install all Required Application directly from the Apple Apps Store or Directly from the Developer.

If going this route - I suggest Not using Startup Assist to migrate things back as this will probably Re-Introduce the existing  issue that existed when the TM Backup was made 

Use wrote " ... only solution to a little quirk like this:... "

Based upon the first 600 of maybe 2000+ posting specific to "BrickMyMac " the quirk the user refers to maybe a Self Inflicted Quirk

As there is really no additional positive suggestions to add, to what has already been mentioned >>

1 - Get Support Choose a product and we’ll find you the best solution.Start now and open an Apple Support Ticket as they are Apple Employees to deal will these types of issues . 

2 - Product Feedback - Apple and make it known to Apple regarding this ongoing issue 

Normally the Application ( Third Party ) itself must Request to be Added to Login Items.

Not the other way around and the User to request through purposeful actions to Add to Log In items.

At least, has is how it has worked on 2 Computers I am running with Ventura 13.0, 13.0.1, 13.1 and now in 13.2

Try adding some Apple apps.

This is a setting that is user-specific. I don't know of anything at the system level that would limit it for all users.