NOO!!! That's wierd... What part is getting stuck?
If you are unzipping it on your desktop, try unzipping it in a folder.
Damn, the pm1 mac version was actually made in Tyranobuilder Visual Novel Engine, while pm2 was made in Unity engine. So thats why only one is working for you. Unfortunately we cannot use Tyrano for pm2 so you might be out of luck )=
Thank you for being interested though! Maybe borrow someone else's computer? =P