Panel "Install Extensions" empty, installing plugins

[nicmask]

Hi guys!
This is my first question in the forum.
I installed Sketchup version 2013 on a Macbook 10.6.8. I tried to add some plugin in Preferences / Extensions / Install Extensions, but nothing appear in the panel that remains empty. But if I open directly the files rbz I can see all them. Is this a problem someone else saw ?

Thank you.
I hope to explained well enough.

Nicmask

[Chris Fullmer]

Hi Nicmask, I've also had this problem. I don't remember if trashing my plist helped or not. I think in the end, I had to uninstall and reinstall SU.