How do I re-Install the Maps App on my Mac?

That’s right, you’d have to reinstall the entire OS, or wait for the next OS release:

https://support.apple.com/en-us/HT204904

Why do you need to reinstall Maps? There maybe another solution. Happy to help if I can, cheers.

First, there is no reason to ever install or run any 3rd party "cleaning", "optimizing", "speed-up", anti-virus, VPN or security apps on your Mac.  This user tip describes what you need to know and do in order to protect your Mac: Effective defenses against malware and other threats - Apple Community   

That being said uninstall MacScan and TotalAV according to the developer's instructions.

You can check to see if you've removed all of the supporting files by downloading and running the shareware akpp Find Any File to search for any files with the application's or the developer's name in the file name.  For the mentioned software you'd do the following search(es): 

1 - Name contains macscan

2 - Name contains securemac

3 - Name contains total

Any files that are found can be dragged from the search results window to the Desktop or Trash bin in the Dock for deletion.

FAF can search areas that Spotlight can't like invisible folders, system folders and packages.  

Also you've got 15 GB of swap files for memory. Rebooting frequjently, with awn SSD drive it doesn't take any time at all, will help with the memory and general overall performance.

Your Zoom app is crashing. Make sure you have the latest version - one was just released yesterday or today.

Have you installed or run any "cleaning", "optimizing", "speed-up" or anti-virus apps on your Mac?

Download and run Etrecheck. Etrecheck is a diagnostic tool that was developed by one of the most respected users here in the ASC and recommended by Apple Support  to provide a snapshot of the system and help identify the more obvious culprits that can adversely affect a Mac's performance.

IMPORTANT:

Before running Etrecheck assign Full Disk Access to Etrecheck in the Etrecheck's Privacy preference pane so that it can get additional information from the Console and log files for the report:

Also click and read the About info to further permit full disk access.

Copy the report

and use the Additional Text button to include the report in your reply.

Then we can examine the report and see if we can determine what might be causing the problem.

It would be the same for any other system installed app. If you don’t start from scratch, not an entire OS is installed - only if the entire thing is installed which will only happen when you start from scratch. Sorry, but that is how it works.

Out of curiosity: how did Maps disappear?

Hey again!

Can you say if there’s a difference de-selecting “Maps” from System Preferences > Apple ID > iCloud > iCloud Drive > Options? (If it’s in fact enabled)?

Although this is a widely known/used developer, I’ve known Global Protect software to cause problems related to internet connectivity, although as the issue happens with no internet connected, maybe unrelated in your case.

One place I’ve checked for similar problems, just as a test is System Preferences > Security and Privacy > Privacy > Accessibility.

Unlock, de-select, or even remove any enabled third party apps > Restart and test.

Also a good place to look is the login items:

System Preferences > Users and Groups > Login Items. Take a screen shot, then remove them all by pressing the “-“ Restart > Test.

Those are just hunches, that report you posted may reveal more info, but as far as the basics:

I know from your other post, the same happens in safe boot, which may exclude user installed software, or indicate file system damage.

Does the same happen in a new user/admin account? This may be revealing, as if it works fine in another user, then Reinstalling the OS will do no good, in fact, it would most likely indicate an issue with your user profile, possibly:

Permissions

An issue with files in your user library, (Cache/Internet Plugins)

Or apps you are having launch upon login, (Those Login Items), etc.

Uninstall SecureMac and Total AV.

Read: Effective defenses against malware and ot… - Apple Community

Where did the app go?

It is part of the macOS install, so you cannot install it separately. The only way would be to erase your drive and reinstall the entire OS.

Did you erase your entire drive before reinstalling the OS? Erase the disk in recovery mode, then download the entire OS and start over. Please make sure you have a backup first.

Hey again! So maps is there, but it hangs when opened, I’d that right?

Can you disable the internet and/or Location Services and then test?

Hey again! Interesting, glad it worked out! Happy to help!