Son installed pirated Logic Pro X--HELP!

if you are using the same Apple ID across the two systems you will need to either remove the work system from that ID

>System Prefs

click the icon and select Sign Out

this should be the only association your two macs have with sharing an account.

There's other files associated with logic Pro X

First thing is to remove the Logic Pro Preferences:

8. Delete user preferences

Before deleting user preferences, note any specific preference settings that you’ve made, and save any custom key commands you've created. Deleting preferences removes any custom preference settings and custom key commands.

To delete the user preferences, do the following:

1. Quit Logic Pro X.
2. In the Finder, choose Go > Go to Folder.
3. Enter ~/Library/Preferences, then click Go. (note: the ~ is required)
4. Remove the "com.apple.logic10.plist" file from the Preferences folder.
5. If you upgraded from an earlier version of Logic Pro, also remove the "com.apple.logic.pro" file, Also remove the com.apple.logic.pro.cs file.
6. Restart your Mac.

Check the link below.

http://macuninstallguides.com/remove-logic-pro-x-on-mac.html

your comment:

My post doesn't contain anything that violates Apple Communities guidelines.

was incorrect.

If it was not obvious to you; your first post was pulled by the mods and likely for the violations I have posted for you to consider if you would like to contribute to these forums.

It's impossible that the App Store asks you to update a program that isn't installed on the computer, especially with a different email.

I think you'll have to reinstall macOS in any case to avoid problems.

But really?You're this upset for something this unsignificant? Wow.... just wow...

Apple Terms

Apple Support Communities Use Agreement

Submissions

1. Stay on topic. Apple Support Communities is here to help people use Apple products and technologies more effectively. Unless otherwise noted, do not add Submissions about non technical topics, including:
   1. Speculations or rumors about unannounced products.
   2. Discussions of Apple policies or procedures or speculation on Apple decisions.
2. Be polite. Everyone should feel comfortable reading Submissions and participating in discussions. Apple will not tolerate flames or other inappropriate statements, material, or links. Most often, a "flame" is simply a statement that is taunting and thus arbitrarily inflammatory. However, this also includes those which are libelous, defamatory, indecent, harmful, harassing, intimidating, threatening, hateful, objectionable, discriminatory, abusive, vulgar, obscene, pornographic, sexually explicit, or offensive in a sexual, racial, cultural, or ethnic context.
3. Post constructive comments and questions. Unless otherwise noted, your Submission should either be a technical support question or a technical support answer. Constructive feedback about product features is welcome as well. If your Submission contains the phrase "I'm sorry for the rant, but…" you are likely in violation of this policy.

My post doesn't contain anything that violates Apple Communities guidelines.

Have a good day

Well wow just wow man... like wow!

I'll see what the mods can do to correct this.

JimmyCMPIT wrote:

I'll see what the mods can do to correct this.

No big deal if they can't but appreciate the effort.