Recently while working in Zend Studio I had couple of crashes that I finally traced down to it running out of memory. After searching around I found that you can bump up it’s default settings by editing it’s .ini file.
The file is located in /Applications/Zend Studio.app/Contents/MacOS
# cat ZendStudio.ini
The settings that you need to bump are Xms and Xmx (in case above they are already bumped up.
My Zend Studie has not crashed since. Happy coding!