Hey, I found a solution! Philipps released a software-update in Aug. 2013. You can download it here: http://www.philips.de/c/projektoren-im-taschenformat/picopix-55-lumen-fuer-noteb ooks-ppx2055_eu/prd/?t=support
For me the projector was still crashing after a few minutes of working fine. The image just got stuck.
If you are using Mac OS 10.9 (Mavericks), you have to disable AppNap for the PicoPix Viewer 2 app, otherwise your Mac will snooze the app when you are running others in the foreground. To do this
1. select the PicoPix Viewer 2 app in your programs folder (make sure the app is closed however)
2. hit Command + i (or select File/Information)
3. in the information window, tick the box "Disable AppNap". Then close the window.
4. Connect the PicoPix 2055 to your Mac and start the PicoPix Viewer app
This worked for me and I can now watch movies without interruption/crashing!