You have a Mac Computer and are running Microsoft Desktop (RDP) throws an Error code: 0x4 just randomly when you try to connect to a computer you have configured for connection.
I reported this issue to MS via their Report Issue form on Mac Remote Desktop client and got the following response: Set this key to a high value, like 10,000 HKEYLOCALMACHINE SYSTEM CurrentControlSet Control Terminal Server. Once I followed these recommendations the problem stopped. I have a Dell desktop running Windows 10 Pro and a MacBook Air with RDP 10. I have the Windows 10 machine setup to auto login when it reboots as it runs my media server but somehow it seems to be getting into a logged out state. Once I go to the desktop and physically log in I can connect using RDP 10 on my Mac again.
For us, this problem just randomly started this year after Microsoft updated their RDP software. “Go Microsoft”
We have searched the web, and noticed that the suggestions to Reboot the computer, or restart the RDP software, or both. Do not appear to reliably work. Although we did have some luck with this.
Another suggestion was to copy or recreate the connection in RDP. Again, only limited success with this solution.
![Error Error](https://content.spiceworksstatic.com/service.community/p/post_images/0000343497/5c4babe9/attached_image/Mac_Remote_Session_Error0x4.png)
For us the solution came when we went into the system preferences of the Remote Desktop Connection
And you will notice the default preferences look something like this.
Microsoft Remote Desktop 0x4 Error Mac Pro
We simply unticked the “Use hardware acceleration when possible” check box.
Microsoft Remote Desktop Error Code 0x4 Mac
That’s it. Amharic reader software, free download for android. After doing this you should notice that it fixes Mac RDP not connecting with 0x4 Errors.