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Mac OS X 10.9.3 update seems to have changed the rules for monitors
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[Don Smith] “Now that I’ve updated my 12-core new Mac Pro at home I can report it does NOT have a problem with the three monitors attached to it. Yet the three-monitor problem persists on my work 6-core new Mac Pro at work.”
What are the differences in monitors between home and work?
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At work (on a 6-core 2013 Mac Pro) I have two 30″ Apple displays connected with active Mini-Display to Dual Link adaptors. One each on different Thunderbolt buses. I also have a regular HD monitor connected to the HDMI port on the third bus. Two of the three monitors will light. Any two. But only two at one time.
At home (on a 12-core 2013 Mac Pro) I have a 27″ Thunderbolt Apple display on one TB bus, an HD monitor (1920×1080) on a second TB bus, and an HD monitor on the HDMI port of the third bus. All three will function normally.
NewsVideo.com
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So it’s the two dual ink monitors, plus a 5th link that seem to cause problems. I take it that the USB ports on the dual link adapters are plugged in to the back of the computer?
If you hold the option key down and choose the “detect displays” button in the displays system preference, will the Mac see the third monitor?
You should also get a lot more resolution options in the “Scaled” menu.
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Personally, I have tried all of the detect display.. and yes the dual links were plugged on; also the usb on the dual links were not working; so it is some kind of power issue; as they work now once downgraded to 10.9.2.
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Tried the Option key to enable Detect Displays. No response.
NewsVideo.com
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[Don Smith] “Tried the Option key to enable Detect Displays. No response.”
Bummer. I guess it really is busted.
🙂
🙁
Jeremy
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I downloaded a beta of 10.9.4 and this corrects the issue with the monitors if you have a Macpro 2013.
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I took the same upgrade and have the same results only 2 of my 3 monitors now work.
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