Hi Jeremy, I did change from .xinitrc to 90-kde.sh . /sw/bin/init.sh export KDEWM=quartz-wm exec /sw/bin/startkde &> /tmp/kde.log I've found the cause, which is responsible for the craziness of the CPU - I cant believe it - if I use the xterm or any other program like Kmail the CPU is normal, at the moment I switch to any other mac os x window or program the CPU goes crazy. I disabled line 2 and 3 no difference. . /sw/bin/init.sh #export KDEWM=quartz-wm #exec /sw/bin/startkde &> /tmp/kde.log so as long as I use an X11 program everything is fine - but if I put X11 in the background the CPU goes up. Any idea how to track this? I am now using alpha2 :-) all my best christof -- public key www.hfph.mwn.de/~chwolf/chwolf.asc Please respect my privacy and do not make my contact information available to third parties.