Well as promised here my findings after a day of trying.
1. It crashes ! Had 4 crashes, one was so serious I had to do a hard boot because finish immediately did not work and the machine was blocked !
2. Whatever it does differently it is too much for my early 2008 MBPro 17/6Gig/OSX 10.7.5. It is MUch slower that 6.4.4.
Previews take eternally to render, sometimes clicking on a folder will end up in a spinning wheel and not one image will appear.
3.It also gobbles ram like crazy. I could run PS CS6 in // with 6.4.4. Impossible with V7.
4. I think it has a problem with old installations of C1-Pro. As I have a 2 times updated (and perfectly functioning) OSX since 10.5 I saw 15 (!!!) old workspace
options in the rolldown list of available workspace options. my created Browser right one was #16.
Maybe that is the reason, Maybe this will work well on a completely new OSX, I will test this as soon as I get a new MBPro probably this year, but for now I´m just using
6.4.4. I did not have much complaints about it.