I got your back to ensure you'll be able to print or email an invoice in QuickBooks Desktop for Mac, skipwith.

Let's make sure QuickBooks for Mac is up-to-date to have the latest features and fixes. You can download and install QuickBooks updates directly from the application or the product updates page. Let me show you how:

1. From the QuickBooks dropdown, select Check for QuickBooks Updates.
2. If a newer version is available, tap Install Update.
3. When prompted, choose Install and Relaunch.
4. When the update is complete, QuickBooks for Mac automatically opens.

For printer integration/compatibility requirements, you can check out this article: System requirements for QuickBooks Desktop for Mac 2021. If the same thing happens, we can use the Verify Utility tool to identify if any data needs fixing and the Rebuild utility tool to fix issues found. Here's how:

1. Go to the File menu, then select Utilities.
2. Select Verify Data.
3. If a problem is detected, go to the File menu, then choose Utilities.
4. Tap Rebuild Data.
5. Run Verify Data again.
6. If it still detects a problem, restore a backup.

Then, run your computer in Safe Boot mode. This helps in figuring out if there’s a conflict between QuickBooks and something installed on your computer. Let me show you how:

1. Shut down your computer.
2. Press the Power button, then press and hold the Shift key on your keyboard until you see your Desktop.
3. Open QuickBooks and try printing a transaction
4. If you’re unable to reproduce the problem, this might indicate a conflict between QuickBooks and something installed on your computer.
5. Return to normal mode by restarting your computer without pressing anything.
6. If the issue persists in normal mode, contact an IT professional.

To troubleshoot common print questions for QuickBooks, check out this article: Troubleshoot printing in QuickBooks Desktop for Mac.

I'm also adding this article to view various details about the updates, enhancements, and fixes that were made to QuickBooks Desktop for Mac 2021: What’s new in QuickBooks Desktop 2021 Mac.

Feel free to update us after performing the solutions as I want to make sure this is resolved. I'll be right here if you need further help. You have a good one.