Since I have OS X (10.11.2) El Capitan've installed: Indesign (CS5.5) reports after a short time, "memory shortage, restart Idesign. Likewise, the text disappears from the screen and have to reload the page. I have 16 GB of RAM in my Mac. What can I do? Or what have Apple or Adobe to do?
CS5.5 and CS6 are not supported under El Capitan. Either revert your OS or upgrade to CC2014/2015.
Thanks Derek, it is obvious. I now know what I must do.