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I have a Mac Pro and a 120 Mbps up (2 Mbps down) broadband cable connection over my Fritbox 7390.
When I use the Microsoft RDP Client or the CorD-Client on OS X (Lion, Snow Leopard, Leopard - all have the same problem), the RDP connection is very slow. When I start Windows in Boot Camp on the same machine and use the RDP client from Windows, everything is fine.
Can anyone tell me the reason for this? How can I fix it? Are there any modifications I can make, such as TCP optimization?
Canadian Lukemigrated from stackoverflow.comAug 5 '11 at 23:29
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7 Answers
I don't know for sure, but I've heard the same complaint. A theory is that on Mac (and Linux) the full images are sent over the network, whereas on Windows some higher level drawing commands are sent, at least for some parts of the screen.
It'd be interesting to try running Remote Desktop Client for Windows on the Mac (or Linux) using Wine, and compare performance this way.
oKtosiTeI had this very issue but the interesting thing is that the RDC to this machine had been working fine some days before – but all of a sudden, over a gigabit network I could see each bitmap block coming across. I tried some other solutions such as executing:
from an elevated commas prompt as suggested here: Vista Remote Desktop Connection Client Slow Delay or Disconnect When Connect to Windows Server 2003 SP2 x64 Edition RDP. That didn't work though.
Then I twigged what had changed since it last worked. I had re-enabled by realtime virus checker (in this case ESET Cybersecurity). I turned off realtime file system protection and instantly RDC and (and also SplashTop desktop, which does the same thing) got back to normal speed.
slhckI had this problem on my MacBook Pro with this:
To make it stick between reboots, add it to /etc/sysctl.conf with…
grgTry tweaking the Display settings on the Mac OSX RDP client.
Go to RDC->Preferences->Display, remove some of the 'expensive' options in the 'while connected' section (such as: show desktop background, show themes, etc...).
oKtosiTeI was having the same issue with both CoRD and Windows RDP. What fixed it for me was adding more memory (I went from 4GB to 8GB).
Canadian LukeOK installing freerdp client ($brew install freerdp in my case, using homebrew) seemed to provide an increased performance over the built-in 'Remote Desktop Connection' for me. Finally fast RDP on mac :)
This thread mentions various other clients as well, FWIW, including CoRD, though for me CoRD seemed still slow'ish, and is built on rdesktop instead of FreeRDP (not sure what that means but might help understand it's speed being comparable to the built in Remote Desktop Connection. (though rdesktop itself seemed more responsive than CoRD to me, for whatever reason).
Also see this thread, it mentions that there is a 'Microsoft Remote Desktop' app in the app store, which, for me, is quite responsive.
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rogerdpackrogerdpackIn my experience connecting to a low-spec'ed Windows 10 box (older second generation Core i5 with 4GB RAM) with RDP from OS X is severely affected by real-time malware/spyware/antivirus scanning. Disabling Microsoft's own Windows Defender's real-time protection made the experience much more tolerable.