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Multi-monitor support is still hugely flaky even in 2017. (Even Apple, which had done this perfectly for years, had a phase in the days of Lion where all their

Multi-monitor support is still hugely flaky even in 2017. (Even Apple, which had done this perfectly for years, had a phase in the days of Lion where all their new full-screen crap was horribly useless on two-display setups.) W10 will utterly destroy your window layout for having the audacity to undock a laptop from a two-display setup. Sometimes it will completely forget the 2nd display that had been working for weeks, with no clear way to fix. Sometimes the display is not "on" yet it is "functional" from W10, leading to aggravating scenarios like windows only located/usable from the display you can't see, requiring you to practically disconnect a laptop to use anything again. Conceptually not hard but apparently rocket science for OS implementers.

SomeHacker44 9y ago
Not just Windows. Even single monitor unplugging and re-plugging messes everything up on my 10.12 running MBP. Sometimes it even forgets my screen scaling settings on the 4K external. It also loves to move windows so that only 20 pixels of the window is showing at some edge of the screen.
abawany 9y ago
Thank you. This system strangeness is why I aggressively stay away from multi-monitor setups even when people push them on to me. I hate reboots, especially unplanned ones, and two reboots on my MBP in a day one day while plugging/unplugging into a Firewire display was enough to make me avoid them like the plague thenceforth.