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The following facts are relevant to the workaround. A separate copy of SystemUIServer runs on behalf of each user, owned by that user, when the user has a GUI login. This is very convenient because it means we can kill this program without requiring passwords and suchlike. SystemUIServer appears to have been very nicely cordoned off by Apple ...


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Your question has two parts: whether an rMBP can drive a 4K display, and whether any exist within your price range. Apple's support site lists compatibility between their laptops and 4K displays. If your Retina Macbook Pro is one of the 15" models, it can drive 60Hz MST displays at 60Hz through the thunderbolt port. If it is a 13" model, it cannot - you ...


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If InsomniaX doesn't work, you could also try macosx-nosleep-extension. Or try to restore the pre-10.7 clamshell mode behavior by running sudo nvram boot-args=iog=0x0 and restarting. When the laptop is connected to an external display, it makes closing the lid put the laptop to sleep, and it makes the internal display stay disabled even after the lid is ...


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You can use caffeinate from the terminal.app. Just open the terminal.app and type caffeinate Without arguments it just stays awake until you ctr+C at the terminal. There are more arguments you can use in order to prevent different system components from sleeping.


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InsomniaX is a third party program designed to do just that: disabling the sleep mode on a Apple laptops. The program can prevent the Mac entering sleep mode from closing the lid or just idling (or both, of course). It's also possible to disable the sleep mode as per timer, after which the sleep mode kicks in normally.


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Here's your answer http://support.apple.com/kb/HT6008 This document from Apple explains


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What's officially "supported" and what's possible don't match. I have a late-2012 rMBP and got 4K out of it at 30Hz. I took a screenshot as proof: Just a normal mini-displayport<->displayport cable was used. More details in my answer here: http://apple.stackexchange.com/a/147765/39878 or on this blog post: ...



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