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#26 | |
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I read the articles, but they use a VGA adapter to fix this. The 2011 version ships with a HDMI-DVI adapter. And that particular adapter does not have the analog signals used in the VGA adapter to fool the mini into thinking it has a monitor connected. In my case it was way easier to just connect it to a monitor in a 2nd bedroom. And the performance is way better now that it has a head! Way way better.
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iMac i7 3.4 GHz, 24 GB Ram, 256 SSD | MBA 2011 i5 1.7 GHz, 4 GB Ram | Mini i7 2.0 GHz, 4 GB Ram, RAID 0 | iPad 2 16 GB | iPhone 5 16 GB | ATV 3 Remember to quote orignal post. |
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#27 | |
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Which IMHO is ridiculous. Windows can go headless without a second thought. It really isn't complicated, it's just a restriction implemented by Apple either by choice or through negligence. |
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#28 | |
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Anyway, the problem is solved for me (its now connected to a monitor) and I've learned about this!
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iMac i7 3.4 GHz, 24 GB Ram, 256 SSD | MBA 2011 i5 1.7 GHz, 4 GB Ram | Mini i7 2.0 GHz, 4 GB Ram, RAID 0 | iPad 2 16 GB | iPhone 5 16 GB | ATV 3 Remember to quote orignal post. |
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#29 |
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Acceleration is disabled when no monitor is detected. There is a way to fix this in software; I don't get the black screens and huge lag any more.
Unfortunately there are many steps and I'm not in front of my mac, so they are a bit vague: Get xcode from the app store. Open xcode and there is a place to get additional packages. Get quartz debug. At some point you'll be taken to the Apple website and you'll have to register as a Mac developer (free) in order to download quartz debug. Start Quartz Debug. Enable Quartz Extreme and Force Quartz GL. Restart your screen sharing session. Granted, this problem for me was intermittent. But I've been going a solid 5 days now with no black screens or splotches, and only very slight lag similar to Windows screen sharing. |
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#30 | |
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Can you give us more details about it once you are in front of your Mac ? I never heard about such a thing in any other forums before and it looks a very clean solution. If this works this is definitely the best solution !!! Thanks for your help philoouu |
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#31 |
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Which step did you have trouble with?
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#32 |
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I installed everything as you said. It does not solve my issue. I have one application that is not working properly when a screen is not connected physically !
Running the debug for me is not tricking the Mini Mac even after a restarting Share Screen. Well let us hope it is not Apple decision to keep it like that. Thanks philoouu |
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#33 | |
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#34 | |
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Do you have any idea why Apple would not let people using properly Share Screen on headless Mac Mini. Is that on purpose or a bug ? For me it looks more like a bug so it should get fixed at some point. One of the main selling point of the Mac Mini is its headless use. |
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#35 | |
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6C nMP D700s 15" 2.3 GHz QC i7 MBP 2.6 GHz QC i7 Mini & 2.3 GHz QC i7 Mini |
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#36 |
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I also went through the random black screens on a 2010, 11 and '12 Mac Mini when screen sharing.
I remembered that I had Apple's "Remote Desktop" app from years ago, I just never used it much because screen sharing worked for the most part. So I installed the Remote Desktop app on my iMac and then the Remote Desktop client on my Mac Mini and I haven't experienced a black screen event in a few months. Hopefully this can help some other folks where this issue was getting annoying.
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2013 iMac 27" i7, 32GBRAM, GTX780M, 256GB Flash, VESA, Yosemite 2012 Mac Mini Server w/ 23TB Storage iPad Air 32GB, iPhone 6+ Gold 128GB, iPad Mini 16GB 3x AEBS 802.11ac, 5x AppleTV |
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#37 |
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Thread necromancy!
Have any of you have trouble waking your Mac mini properly, and have had it remedied, by using this resistor/adapter trick? Especially using the Apple remote.
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"There's no bigot like a religious bigot and there's no religion more fanatical than that espoused by Macintosh zealots." ~Martin Veitch, IT Week [31-01-2003] |
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#38 |
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The MiniDP-VGA dummy dungle work fine on my MacPro !
To the one who make one, what resistor do you use ? I use a 85 ohms. The MacPro find a 800x600 VGA screen by default, I have to set upper resolution manually. Will resistor value change anything ? |
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#39 | |
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With aTB display connected, remote performance was good. I disconnected the Tb display and tried the Apple Remote Desktop but that too also left me with the screen not refreshing. I'll try the quartz method to see if that works.
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MacBook Air 6,1 - 11"-1.7Ghz-8G-512G |
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#40 | |
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Even if there is an improvement, the quartz method is a hassle anyway because you have to activate it each time after logout/login or reboot, although that could probably be automated. I do have another idea but I haven't had the time to try it yet. The hardware dongle method is just spoofing an EDID for a monitor that doesn't exist, and this is reported to work just as well as having a monitor hooked up. The thing is, there's also a software method for forcing an EDID when no EDID is detectable, and since that is free, I'm going to give it a try some day. |
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#41 |
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mac mini headless black screen
Hi.
first post here... :-) Jus wanted to share that I have beeen struggelign for a while with setting up a headless mac mini running snow leopard 10.6.8 and accenssing it from my mbp running mountain lion. Screen in mac´s own screensharing app woks fine but when the mini goes to sleep, sceensjhring cant wake the screen up. just stays black with a cursor. file and everything are accessible with finder but no screen.... tryed everything and I mean everything so I came across "team viewer" http://www.teamviewer.com works!!! free for personal use!!!! absolutely amazing and easy to set up and use!!! /hep! :-) |
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#42 |
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maybe a VGA dongle is useful
I came across this posting: http://blog.macminicolo.net/post/338...dless-mac-mini
"A dummy dongle mimics a monitor being attached to a Mac. It will force a Mac to load the video driver and take full advantage of the GPU. " Is there any way to trick the computer into using the GPU even without hardware attached? Yes there seems to be one I just found a post at https://discussions.apple.com/thread...rt=15&tstart=0 which references a display driver used as part of Avatron Software's "Air Sharing"/"Air Display" display sharing system. The free part that runs on the mac that you want to "extend" the display of is available as the "host software" at http://getairdisplay.com/ After I installed and rebooted and adjusted the installed System Preference panel (detailed directions and screenshots are part way down about "ON THE PRIMARY COMPUTER" at http://avatron.com/forums/read.php?47,15501 ) and then rebooted again, things are better on my headless MacMini ML Server, but not completely resolved. Any idea what settings need to be set? Install a third party display driver (for example from http://getairdisplay.com) and it works! Last edited by j-beda; Aug 5, 2013 at 01:28 PM. Reason: found software solution |
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#43 |
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Good find indeed on the macminicolo site
The rest of your info is good though...
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2012 2.3GHz i7 Mini, 16GB RAM; 2009 2.93 GHz C2D iMac, 8GB RAM, GT120 GPU 1.83 GHz CD Mini, 2GB RAM, 200GB HD; 1.25 GHz 17" G4 iMac, 2GB RAM, 128GB SSD 64GB Silver iPhone 5s, 64GB White iPad Air |
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#44 | |
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#45 | |
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spoke too soon
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This discussion might also be of interest: https://discussions.apple.com/message/22657346#22657346 It gives a link to showing how to make a dongle with the 3 resistors mentioned above: http://www.geeks3d.com/20091230/vga-...ga-dummy-plug/ |
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#46 |
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Sorry to bring this up again, but has anyone tried this with one of the Mavericks developer previews? Does anyone know if the issue has been resolved?
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#47 |
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This appears to be fixed for me after upgrading my headless Mac mini to Mavericks.
I can do screen sharing via my MacBook Air and no longer get screen refresh issues or black box issues. Can anyone else confirm? After I upgraded the Mini, I tested screen sharing via the MBA before (Mountain Lion) and after upgrading the MBA itself to Mavericks, and it worked in both scenarios. It appears if you just upgrade the Mini to Mavericks, any OS X variant can screen share with out the cursor/black box issues. |
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#48 |
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Maverick
It's only partially fixed. Yes, the black blocks are gone but there's still a horrible refresh rate. It's really annoying that there's no patch for this.
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#49 | |
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The dongle solution works great
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