I can help you with what you need to do with your QuickBooks Desktop (QBDT) for Mac 2012, @CakeMaker60. Thus, you can install the software seamlessly.

I'll have a way to correct the issue you've encountered in installing the QBDT for Mac 2012.

QBDT for Mac 2012 is already outdated. That's why you can no longer run on your Mac with the Monterey version. With this, I'd recommend updating your account to the latest release. Before that, ensure that your computer meets the systems requirements. 

Once confirmed, follow the steps below: 

1. Go to the QuickBooks Download page. 
2. Select your Country, Product, and Version in the drop-down arrow. 
3. Click Search, then Download. 

After that, open QuickBooks and follow the on-screen instructions to install the program. Ensure to create a backup of your company file for future use. 

To get Product and License numbers, I'd advise contacting our Customer Care Team. Make sure to contact them within business hours to ensure a swift response.

Here's how: 

1. Go to this QBDT Help link. 
2. Select your product and click Continue. 
3. Enter your concern in the box and tap Continue. 
4. Choose either Chat with us or Have us call you.  
5. Follow the on-screen instructions.

Additionally, feel free to visit the following articles on how to fix QuickBooks performance issues and other guides to manage your account: 

• QuickBooks Desktop Mac 2021 User Guide
• Resolve QuickBooks Desktop performance issues: Manage your data file

Let me know if there's anything else you need. I'll be right here to help you with your account. Keep safe, CakeMaker60.