QB 2022 R8 for Mac cannot use Multiuser mode (QB Server), other oddities

Thanks for sharing your concern in the QuickBooks Community, WLCoon. I'll help you fix this issue so you can get back to your business. 

I appreciate you for performing the recommended solution to get this resolved. Here are some solutions to troubleshoot issues while sharing your company file in QuickBooks Desktop (QBDT) for Mac. Let's start by checking if QuickBooks Server is running and if the company file is shared which only be installed and running on a host computer. Let's make sure the company file is on the same computer the QuickBooks Server app is installed on. Here's how:

1. Click Go and select Applications.
2. Double-click the QuickBooks 20XX Server.app icon.
3. If you need, share the file.
   1. If the file’s listed under NOT SHARED, click the file then Start Sharing.
   2. If the file’s not listed, select + to add the file.

If everything is fine, verify if the file-sharing permissions are set correctly on the host computer. 

1. Go to the Apple menu and select System Preferences.
2. Click the Sharing icon.
3. Select the File Sharing checkbox.
4. Add the folder where the company file is stored to Shared Folders.
5. Click + under the Shared Folder column.
6. Browse to the folder where the company file is located, then select Add.
7. Under the Users column, make sure the permission is set to Read and Write for Everyone or just the specific users who will be using QuickBooks.

Also, your hardware can sometimes block the communication between QuickBooks for Mac and QuickBooks Server. We can test it by following these steps and see if it fixes the issue:

1. Unplug the ethernet cable or if you’re using wireless internet, turn off your Wi-Fi.
2. Reboot your computer.
3. Open QuickBooks, then turn on multi-user mode.

If the problem persists, follow the rest of recommended steps in this article: Troubleshoot multi-user issues for QBDT for Mac. You can also give us another shot and contact our chat support to fix the error. Here's how you can reach them:

1. Go to: https://quickbooks.intuit.com/learn-support/help/en-us/contact-us?product=QuickBooks%20Desktop%20for....
2. Choose QuickBooks Desktop for Mac as the product.
3. Hit Continue.
4. Select your preferred option to contact support.

I've also attached an article you can use to learn how to set up sharing permissions, as well as your firewall settings for multiuser mode in QuickBooks: Use multiuser mode in QuickBooks Desktop for Mac. As always, feel free to read the topics from our help articles in case you need tips and related resources while working with QuickBooks in the future.

Don't hesitate to leave a comment below if you have other questions about the multiuser mode in QBDT. I'll be around to help you out. Enjoy the rest of the day!