My new MacBook Pro Retina 13″ (OS X 10.10) gets completely unusable when I attach the HDMI cable to the HDMI port.
I have noticed that there are few processes that will start to consume crazy memory. In particular "SystemUIServer" process, around 65 GB RAM (which I do not even have from an hardware perspective), and the "kernel_task" process several GBs of memory usage.
The problem is that the resolution of the screen is changed once the HDMI cable is plugged and, even after killing the SystemUIServer, if i try to open the monitor settings to change the resolution this task will hang for ever making the usage of the laptop connected with the beamer impossible.
I have tried to search on internet but seems that no one has got the same problem.