Hi, this is especially for MacPro 2.66 (perhaps also the other ones) users with more than 2 GB of Ram. Can someone make a test for me please? You just have to use more than 2 GB of physical Ram with any app (I have tested it with Logic and Quicktime). So use lots of samples in Logic or open a couple of movies or Audio-CDs in Quicktime. Open the activity window and report me what it is shown concerning the physical ram usage. My problem is that if I use more than these 2GB the activity window shows the following: http://www.xcellent-productions.de/downloads/activity2.png So, Logic is using more physical ram than the NASA has!? Shortly after that Logic (or Quicktime) crashes with crash report and song (crashed).lso. I am doing primarily orchestral stuff and that is impossible with just 2GB of Ram available. The computer was 2 weeks in "reparation" but without succes. All hardware tests are fine... SetUp (not TDM yet with this workstation): MacPro 2.66, 5GB Ram, OSX. 4.8, Logic 7.2.3 Many thanks!!!! Axel P.S.: I wonder why the bootcamp windows is also just able to acces 2 GB of Ram. If you use more here, windows comes up with a "please free some ram and close other applications" while the running application freezes. Perhaps it is a big hardware issue in these MacPros.