HT204149: Apple Mini DisplayPort adapters: Frequently asked questions (FAQ)
Learn about Apple Mini DisplayPort adapters: Frequently asked questions (FAQ)Q: using the thunderbolt to vga adapter, i have to unplug and replug the connection to get my display to "wake up" what's the d ... using the thunderbolt to vga adapter, i have to unplug and replug the connection to get my display to "wake up" what's the deal? more
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Helpful answers
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Aug 12, 2012 9:31 AM in response to donjamburby den.thed,First try > Resetting your Mac's PRAM
There have also been others reporting problems with analog VGA connected monitors. If your monitor also supports DVI, then you may want to use the supplied HDMI to DVI adapter or switch to a Mini DisplayPort to DVI Adapter and a good DVI cable.
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Nov 13, 2012 2:29 PM in response to den.thedby EOC Admin,I can confirm the analog VGA issue. I have a 2012 Mac Mini server with the Thunderbolt to VGA adapter. When I reboot my Mini with the adapter connected the Mini gets stuck in a rapid restart loop that I can only stop by pulling the power cord. The Mini chimes about once ever second when stuck in the loop never getting to the grey apple.
However, if I reboot without the VGA adapter plugged in the Mini restarts just fine. I then plug the adapter back in and everything seems fine.