Please check these tips first:
- ShareMouse must be installed on all computers of a workplace setup.
- Make sure, that ShareMouse is actually running on all computers:
Windows: Do you see the program icon in the lower right of the Windows system tray? If not, click the Windows Start button in task bar . If you still can't find the task bar icon, it may be hidden by Windows and you need to manually make it visible:
If there is no ShareMouse icon in the subfolder, ShareMouse is not running. Please check, if no “security” program (such as an “Antivirus” or “AntiSpyware” software that is marketed to give you the feeling of safety) is not blocking ShareMouse from being executed.
Mac: Launch the ShareMouse program if you don't see the program icon in the upper right of the upper status bar (near the clock). Also make sure, that ShareMouse is authorized in the macOS accessibility settings.
- Close the Monitor Manager and/or Settings window before using ShareMouse.
- Test for any potential 3rd party incompatibility issue by closing any other (background) program For example, Microsoft "IntelliType", "Microsoft IntelliPoint" and "Microsoft Mouse and Keyboard Center" are known to cause strange phenomena in ShareMouse as those programs alter keyboard input. Also close any other software KVM program to eliminate the risk of interference.
Quick help for IT Pros
Network ports TCP 6555 and UDP 1046 must be open for ShareMouse on all computers (unless changed in the ShareMouse network settings).
This step-by-step troubleshooting guide assists you if you cannot establish a network connection at all:
- Make sure that your computers are network connected with a Ethernet or Wireless LAN connection. This is an essential system requirement.
- Make sure that no "security" program such as "Antivirus/AntiSpyware"-scanner programs blocks network traffic of the ShareMouse keyboard hook.
- If you configured a password on any ShareMouse client, make sure to configure the same password in all other ShareMouse clients of one work place.
- The mouse & keyboard must not be touched for a few seconds before you can remote control that PC. This restriction avoids confusion of users which may be caused by other users trying to remote control that computer. Please check that no other 3rd party program is simulating keyboard or mouse input on the PC which may prevent ShareMouse from activating the remote control.
- The computer name of each connected PC must be unique.
- If a computer is connected to the same network by multiple network adapters, disable automatic client search in the ShareMouse client management and specify the IP addresses of the computers manually.
- If using multiple network adapters simultaneously, each adapter must connect to a separate(!) subnet (more info).
- Have you configured the Firewall of all computers properly? All ShareMouse programs must be granted access to the local network. A permanent connection/disconnection cycle indicates that one of the computer's firewall is accepting incoming connection attempts but block incoming answers. In such case, you must solve the firewall issue:
The built-in Windows firewall may lock programs even if you granted access. In this case, exit ShareMouse, open the firewall settings and delete all ShareMouse related "exceptions" rules and launch ShareMouse again. Than grant ShareMouse network access if the firewall warn message appears.
Mac Firewall: macOS creates a firewall rule based on the combination of the App and the folder it has been launched from. If you move the App you need to delete the macOS firewall rule manually and have macOS create a new rule based on the new file location.
Certain firewall products may still affect the network connection, even if they are 'disabled'. For testing, you may consider uninstalling any network related 3rd party software and reboot your PC just to check whether it resolves the issue.
Make sure to disable any "MAC filter" in your router, that may prevent a network connection between the computers.
If using a router or switch, try a direct crossover cable instead, to eliminate the risk that such devices are blocking ports. You can configure ShareMouse to use a specific network adapter in the network settings.
- Restart the router, switch and computers to check if it solves any issue.
- Make sure, that any network hardware (switches, routers, firewalls, etc.) uses the latest firmware version.
- Close all other running programs and unnecessary background processes on all computers except ShareMouse to isolate incompatibility issues and to verify that no other application may lock the network or filter out any network traffic. Especially, "security" software may block network traffic.
- The required UDP ports may be blocked by your network's security credentials. Make sure that ShareMouse is allowed to broadcast UDP as this is the method, ShareMouse sends the mouse/keyboard input to the networked computers. Sometimes this is blocked by Routers/Switches as they consider it "UDP flooding".
- If you changed the default UDP port in ShareMouse, make sure that you apply this change to all ShareMouse installations on all computers. All ShareMouse installations must use the same UDP port!
- ShareMouse may work via VPN and other advanced network configurations but we won't be able to provide assistance here. Please check with your IT admin.
Verify general network functionality
Ensure that all computers have the TCP/IP protocol installed:
- On any of your computers, click
- In the terminal window, type ping localhost and press Enter .
- If you receive "Request timed out", the computer's TCP/IP configuration is essentially malfunctioning.
Find out the IP addresses
To continue troubleshooting, you need to know the IP address of the computers. These are the unique IDs under which the PCs can be identified and reached on the network:
- In the terminal window, type ipconfig and press Enter to output a list of network adapters on the computer and their respective IP address (labeled "IPv4").
- IP addresses for local network usually begin with 169.254.x.y or 192.168.x.y (whereas x and y are numbers between 0…255). If the IP address does not begin with either 169 or 192, the network adapter is most likely connected to the internet instead of a local network. ShareMouse however does not work over the internet.
- If everything looks OK, write down the IP address of the computers as you will need them for the next step…
Check basic network communication
Now, try to call the opposing computer with the ping command:
- In the terminal window, type ping x.x.x.x (where x.x.x.x is the IP address of the opposite PC) and then press Enter .
- If you receive "Request timed out", the calling PC cannot find the other PC on the network.
Check for port conflicts
In very rare occasions, it may be that the UDP port being used by ShareMouse are already occupied by another application:
- You can find the UDP port used by ShareMouse in the network settings.
- In the terminal window of all PCs, type netstat -a and then press Enter .
- Check the output whether any other application is using a port that is also used by ShareMouse. If a port is already occupied by another program, choose another port in the ShareMouse network settings.
Still no joy?
We are sorry to hear that and we are aware, that computer networking can be tricky.
We kindly ask for your understanding, that the low license fee does not include individual computer network consulting services. The complexity of possible hardware/software configurations makes it impossible for us to provide individual support on network configuration issues. A stable and working network connection is considered a basic system requirement for ShareMouse.
Please ask your local IT administrator for assistance or check out networking tutorial websites for help.
Remote Control Issues
- Check, if settings under Settings » Switching may prevent monitor switching.
- Verify correct monitor positions in the ShareMouse Monitor Manager.
- Windows only: If remote control does not work while a specific program window is visible, such program may have been launched with higher user credentials than ShareMouse: If using ShareMouse without the Windows service, it cannot remote control programs running with different user/admin credentials.
Solution: Launch ShareMouse with admin rights as well (right-click the program icon and select "Run as Administrator") or restart the ShareMouse service which launches ShareMouse with elevated rights.
- The computer's mouse and keyboard must be unused for a few seconds before it can be remotely controlled to avoid users being surprised by another user's remote control attempt. Therefore, make sure that third-party software does not simulate mouse or keyboard input on the PC that may prevent ShareMouse from enabling the remote control.
ShareMouse should run as smooth as you can see in our demonstration video as we also use off-the-shelf hardware.
If you experience high CPU load on a Mac, disable ShareMouse option "Settings » Keys » Secure input warning" and restart your Mac.
If mouse cursor or keyboard input is sluggish or delayed, try following suggestions:
- Prefer wired network (Ethernet/Gigabit) over wireless network connections if possible. Ethernet network connections are more stable and in many cases, offers high data transmission rates. To select the fastest network adapter, enter its IP address in the ShareMouse client management.
- Avoid high network load while using ShareMouse. Network load is caused by copying large or many files over the network; e.g. network-based backups such as Timemachine, etc., FTP transfers, web based video conferences or automated large software update downloads.
- Please note, that there might be a high load on your network if you are not aware of it, e.g. in case of a background update download of the operating system.
- “Security” program (such as an “Antivirus” or “AntiSpyware” software, that is designed to give you the feeling of safety) may hook into the network and scan data transmission. This may not only slow down your whole computer caused by extra CPU load but also may affect the network performance.
- Avoid high CPU load while using ShareMouse. If the computer is busy with other tasks (such as video rendering, playing games, performing complex calculations), ShareMouse may not get sufficient CPU power to perform its operation.
- Laptops running on batteries may throttle the CPU to optimize battery runtime, resulting in reduced system performance. If possible, connect your Laptop to a power supply to take advantage of its full CPU potential.
The network troubleshooting provide additional tips.
- Modifier keys CTRL , CMD , WIN and ALT have different meanings on Mac vs. Windows. For example, if you wish to press CMD on a remote controlled a Mac, you would need to press STRG on a remote controlling Windows PC. ShareMouse for Mac can optionally auto-translate these modifier keys for you.
- RemoteDesktop in full-screen mode on the local computer may absorb keyboard strokes which will not be sent to the remote computer. Workaround: Enable at slight dimming on the local computer. This dimming layer takes away program focus from RemoteDesktop if another computer is remote controlled.
- If the characters on the remote computer differ from key strokes made on the local computer, verify that the keyboard layout matches on both computers:
- Windows: Check
- Mac macOS: Check
- Mac only: If keyboard input is not transmitted/processed on a Mac, click the ShareMouse menu bar icon and check if ShareMouse reports a "Secured Input" error.
The macOS system function "Secure input" protects sensitive text input (such as password input) from being tracked by other programs, which generally is a good thing. Unfortunately, some applications may not release this feature after use and any input stays invisible for 3rd party apps, such as ShareMouse. Work around: Disable "auto-submit" feature of any auto-login feature and/or close and restart the application, that caused the interference.
Example: Safari may leave Secure Input enabled on secure web pages when option "User names and passwords” is enabled in Safari Preferences » Autofill tab.
Solution: Disable the option to avoid the Secure Input lock-up or alternatively close the Safari window you have open or restart Safari.
SecureInput on the Mac
The macOS system function "" protects sensitive text input (such as password input) from being spied out by malicious programs.
This feature is activated by the program, that receives the text input and it has to be disabled by the same program after data entry. For example, the Safari browser is enabling "" in password input fields.
Unfortunately, some applications do not to seem to release "" rendering any subsequent text input invisible for 3rd party apps, including ShareMouse.
This not an error in ShareMouse and ShareMouse has no way to remotely disable "". If this would be possible, also malware would make use of such remote disabling, making the security feature " " obsolete.
Work around: Disable "auto-submit" feature of any auto-login feature and/or close and restart the application, that caused the interference.
No Windows mouse pointer
Windows OS assumes running on a touch tablet if no physical pointing device is attached and automatically hides the mouse pointer.
Solution: Either connect a physical mouse device or activate "mouse keys" in Windows as a workaround.
File Drag & Drop
- Make sure that Drag & Drop is enabled under Settings » Data Exchange on all ShareMouse clients.
- The target program that shall receive the dropped file must not be launched with higher user credentials than the ShareMouse installation on the target computer. In such case, launch ShareMouse with administrative rights, too.
- Drag & Drop may sometimes general not work properly on Windows, regardless of ShareMouse. If Drag & Drop does not work on the local computer, please browse Google for solutions.
- Apple's "Handoff" sharing feature collides with the ShareMouse clipboard sharing feature and must be disabled in the " " (Thanks to Daniel M. A. for this tip!).
- You must use the remote clipboard paste hotkey (as configured in the ShareMouse settings) to insert the clipboard remotely. The context menu command "Paste" pastes the local clipboard only.
- Make sure to use the remote paste hotkey as specified in the ShareMouse settings.
- Don't mix up the Windows CTRL - key with the Mac equivalent CMD .
- HTML contents can't be copied from Windows to Mac via clipboard sharing. Any text will be copied without formatting.
- Make sure that the TCP network port used by ShareMouse can pass the firewall.
- Please try assigning another remote clipboard paste hotkey to isolate hotkey interference issues with other applications.
- Please close any other 3rd party program which may be related to clipboard contents to isolate any potential incompatibility issue.
If you wish to use ShareMouse within a virtual machine session running on a remote computer, you may need to install ShareMouse within the virtual machine session.
You may need to exit ShareMouse on the remote host PC to avoid interference with the vm session.
Also make sure to use a "bridged network connection" between host computer and the vm session to enable ShareMouse accessing the session.
If using an Apple Mac with the virtualization software "Parallels", issues with modifier keys SHIFT, CTRL and ALT are known.
Workaround: In ShareMouse, disable "Settings » Keyboard." under
We are not able to provide support for ShareMouse running in virtual machines as we do not have any influence in how virtual machine software passes input between host PC and virtual machine sessions.