Hello

I have been scouring the forum and the internet but cannot find an answer. I have downloaded [Plugin Library] LibFredo6 - v4.9b - 19 May 13 as well as curviloft. I have dragged and dropped both entire folders into:
Macintosh HD/Library/Application Support/Google SketchUp 8/SketchUp/plugins

Here is the problem, I cannot find info anywhere on what to do from here....

I have restarted sketchup and the plugins are not there.

Then I tried the preferences/extensions/install extension....find the folder. I am not able to select any of the files in the folders, they are greyed out. I am suspecting it is because they are all .rb not .rbz

This is the first time I have ever tried to put a plugin into my sketch up.

Please can someone advise on how to do this properly, I really cannot understand what is going on

Thanks in advance