If QuickBooks Desktop Mac Multi-User Mode is not working, the problem is usually related to the host computer, QuickBooks Server, Mac file-sharing permissions, firewall settings, network connectivity, or user licensing. Start by confirming that the company file is stored on the host Mac, QuickBooks Server is running and sharing the file, and the host and workstations are connected to the same network. Intuit also recommends checking incoming firewall connections and ensuring the shared folder has appropriate Read & Write permissions.
Introduction
QuickBooks Desktop for Mac supports multi-user access so multiple people can work on the same company file from different computers. When everything is configured correctly, one Mac acts as the host and shares the company file with other workstations on the same network.
When QuickBooks Desktop Mac Multi-User Mode is not working, however, users may be unable to see the company file, connect to the host computer, or open the file at the same time.
The good news is that many multi-user problems can be traced to a small number of setup or connectivity issues. The steps below will help you identify where the problem is and what to check first.
Why Is QuickBooks Desktop Mac Multi-User Mode Not Working?
Several issues can prevent multi-user access:

• QuickBooks Server isn't running on the host Mac.
• The company file isn't being shared.
• The company file is not stored on the computer running QuickBooks Server.
• Mac File Sharing permissions aren't configured correctly.
• The macOS firewall is blocking incoming connections.
• The host Mac is asleep or unavailable.
• The computers aren't connected to the same network.
• Users don't have the necessary QuickBooks permissions or accounts.
• Your QuickBooks license doesn't support the number of users trying to connect.

Intuit's current Mac guidance specifically recommends checking the QuickBooks Server application, firewall settings, file-sharing permissions, and host computer status when troubleshooting multi-user problems.
1. Check That QuickBooks Server Is Running
The first thing to check is the Mac that hosts your company file.
QuickBooks Server is responsible for sharing the company file with other computers in a Mac multi-user setup. Intuit notes that the QuickBooks Server app should be installed and running on the host computer, and the company file should be located on that same computer.
What to check
On the host Mac:

1. Open QuickBooks Server.
2. Look for your company file.
3. If the file appears under Not Shared, select it.
4. Choose Start Sharing.
5. If the file isn't listed, use the option to add the company file.
6. Confirm that the file is stored on the same Mac where QuickBooks Server is installed.

If QuickBooks Server isn't sharing the file, other workstations may not be able to connect even though QuickBooks itself opens normally.
2. Make Sure the Host Mac Isn't Sleeping
Multi-user access depends on the host computer being available.
If the Mac hosting the company file goes to sleep, other users may lose access to the shared file. Intuit specifically recommends checking whether the computer running QuickBooks Server has entered sleep mode when troubleshooting Mac multi-user problems.
For a business computer that needs to provide access throughout the working day, review its sleep and power settings so the host remains available when other users need QuickBooks.
3. Check Mac File-Sharing Permissions
Incorrect file-sharing permissions are another common reason users can't access a QuickBooks company file.
On the host Mac:

1. Open System Settings.
2. Go to Sharing.
3. Make sure File Sharing is enabled.
4. Add the folder containing the QuickBooks company file to the shared folders.
5. Check the users listed for that folder.
6. Make sure the appropriate users have Read & Write access.

Intuit's troubleshooting instructions recommend adding the company-file folder to Shared Folders and checking that permissions are set to Read & Write for everyone who needs access, or for the specific users who should have it.
Why this matters
A user may be able to connect to the Mac but still be unable to work with the company file if the operating system doesn't grant the required access to the shared folder.
4. Check the macOS Firewall
A firewall can block the network connection required for multi-user access.
On the host Mac, review the firewall settings and make sure QuickBooks Server is allowed to accept incoming connections. Intuit includes this as one of its recommended troubleshooting steps for QuickBooks Desktop for Mac multi-user issues.
The exact location and wording of firewall controls can vary by macOS version, so look for the firewall's application or incoming-connection settings and allow QuickBooks Server when appropriate.
After changing the firewall setting, try connecting to the company file again from a workstation.
5. Confirm All Computers Are on the Same Network
QuickBooks Desktop for Mac multi-user mode is designed for workstations connected through a shared network. Intuit states that the workstations need to be on the same network to access the shared company file.
Check that:

• The host Mac is connected to the expected network.
• Each workstation is connected to that same network.
• A workstation hasn't switched to a different Wi-Fi network.
• Network access isn't being interrupted by a router, VPN, or other network configuration.
• The host Mac is powered on and accessible.

If one computer can connect while another cannot, the problem may be specific to that workstation's network or permissions rather than the QuickBooks company file itself.
6. Verify Your QuickBooks Multi-User License
Multi-user access requires the appropriate number of QuickBooks user licenses.
For example, a three-user license is intended to cover three users. Intuit recommends checking the license information in QuickBooks to confirm how many users are covered.
You should also make sure each person has an appropriate QuickBooks user account and password.
Check user accounts
In QuickBooks Desktop for Mac:

1. Select Company.
2. Choose Users and Passwords.
3. Review the existing users.
4. Add or update users as needed.
5. Check their assigned permissions.

QuickBooks Desktop for Mac allows administrators to control what users can access within areas such as banking, sales, payroll, and expenses.
7. Turn On Multi-User Mode on the Host
Once the network and sharing configuration is ready, make sure multi-user mode is actually enabled on the host computer.
Sign in to the company file as the administrator and go to:
File → Enable Multiuser Mode
Intuit's Mac instructions identify this as the step that starts sharing the company file with workstations in a server-workstation setup.
If multi-user mode is disabled, other computers may not be able to access the file as expected.
8. Restart the Host and Workstations
If your configuration looks correct but QuickBooks Desktop Mac multi-user access suddenly stopped working, a simple restart can help clear a temporary network or application problem.
Try this sequence:

1. Close QuickBooks on all workstations.
2. Close QuickBooks on the host Mac.
3. Confirm the company file isn't being modified by another process.
4. Restart the host Mac.
5. Start QuickBooks Server again.
6. Confirm that the company file is shared.
7. Restart the affected workstation.
8. Try opening the shared company file again.

This doesn't replace checking the underlying configuration, but it can help after a temporary connection problem.
9. Check Whether Only One Workstation Is Affected
An important troubleshooting clue is whether every workstation has the problem or only one.
If every workstation cannot connect
Focus on the host Mac:

• QuickBooks Server
• Company-file sharing
• File permissions
• Firewall
• Network connection
• Host computer availability

If only one workstation cannot connect
Focus on that workstation:

• Network connection
• QuickBooks installation
• User credentials
• Access permissions
• Firewall or security settings
• Connection to the shared folder

This simple comparison can prevent you from changing working settings on the entire network when only one computer is having trouble.
10. Don't Confuse Mac and Windows Multi-User Instructions
QuickBooks Desktop has different networking procedures for Mac and Windows.
For QuickBooks Desktop for Mac, Intuit's current setup documentation uses a Mac-based host/server arrangement with QuickBooks Server, shared folders, Mac firewall settings, and network-connected workstations.
Windows troubleshooting articles may mention tools and settings that don't apply to the Mac version. If you're using QuickBooks Desktop for Mac, follow Mac-specific instructions rather than changing Windows-oriented hosting settings.
Quick Troubleshooting Checklist
Before contacting support, work through this checklist:
These checks align with Intuit's current Mac multi-user setup and troubleshooting guidance.
When Should You Get Technical Help?
If you've verified the host, QuickBooks Server, network, permissions, firewall, and license but the problem continues, additional troubleshooting may be necessary.
Before making major changes, create a current backup of your company data. Avoid randomly moving or renaming the company file, changing permissions across unrelated folders, or repeatedly reinstalling QuickBooks without identifying the underlying issue.
If you need assistance with a persistent QuickBooks Desktop Mac Multi-User Mode not working problem, you can contact QuickBooks support or a qualified QuickBooks professional. If the support service you use provides phone assistance, you can call 1-888-284-8863 to discuss the issue and determine the appropriate next troubleshooting step.
FAQs
Why won't QuickBooks Desktop for Mac open in multi-user mode?
The most common areas to check are QuickBooks Server, company-file sharing, Mac file permissions, firewall settings, network connectivity, and user licensing. Start with the host Mac because it controls access to the shared company file.
Can two Macs use the same QuickBooks company file?
Yes. QuickBooks Desktop for Mac supports multiple users working on a company file from different workstations when the multi-user network is properly configured.
Does the host Mac need to stay on?
Yes. The computer hosting the company file needs to remain available for other workstations to access the shared file. If the host goes to sleep or becomes unavailable, other users may lose access.
Where should the QuickBooks company file be stored for Mac multi-user mode?
For the Mac server setup, the company file should be on the same computer where QuickBooks Server is installed and running.
Why can one user connect while another cannot?
If only one workstation is affected, check that computer's network connection, QuickBooks setup, user permissions, and firewall or security settings. The problem may be isolated to that workstation rather than the host.
Does QuickBooks Desktop for Mac require a multi-user license?
Yes. Intuit states that multi-user mode requires a QuickBooks multi-user license with enough licenses for the users who need access.
Can I use QuickBooks Mac multi-user mode from different networks?
QuickBooks Desktop for Mac multi-user mode is designed for workstations on the same network. Intuit specifically notes that workstations must be on the same network to access the shared company file.
Conclusion
When QuickBooks Desktop Mac Multi-User Mode is not working, start with the basics: verify the host Mac is available, make sure QuickBooks Server is running and sharing the company file, check File Sharing permissions, allow the required incoming connection through the firewall, and confirm all workstations are on the same network.
Also verify your QuickBooks user accounts and multi-user license before making more complicated changes. Working through these checks in order can help narrow down whether the problem is with the host, network, permissions, or a specific workstation.
If the issue remains after these checks, getting targeted technical assistance can be the next practical step. For phone-based help, 1-888-284-8863 can be used to discuss the problem and determine what assistance is appropriate.