Thanks so much Dave and TIG. I really am trying here, I just keep hitting a dead end. I have followed these directions precisely, but when I get to the finish (Preferences/Choose Extensions/Install Extension/Open) I receive an error message: "Unable to install the Extension you have chosen for some unknown reason. Consult your Extension's documentation for additional help." The Sketchucation Plugin Store tool would be a dream come true, but I am also unable to install that for the same reason. It all ends in this error message.

I am having such trouble trying to install this (or any) plugins on my Mac. I have placed the downloaded extensions in the plugins folder (MacHD/Library/Application Support/Google Sketchup 8/Sketchup/Plugins) and have made my security "read and write" but I cannot get anything to work. I am not able to get the Sketchucation Tools to function either. I have to work through an administrator so I am trying to get a very clear idea of what to do before I contact them again (third time!). I'd appreciate any help.

I have set the sharing and permissions to read and write, it did not resolve the issue.

I have a new Mac (OSX 10.8.5) and a new version of Sketchup (Pro 14) and I am unable to install any of my favorite plugins. Mainly LibFredo and FredoScale. With my administrator's help I have installed the extensions into the correct folder, but they are not able to load into sketchup. The error message is "Unable to install this Extension. Consult your Extension's documentation for additional help." I was also hoping to install the Sketchucation Tools extension. Help please!

Thanks Tig - I think the file types changed during a bugsplat and I re-set them and it seems to be (mostly) working.

I think I resolved it - I had several "bugsplats" in a row and I think it set the "file types" to only accept skp files. I reset it to "all file types" and restarted and it seems to be functioning again. I'm still having some crash issues, but I think I may just re-install Sketchup. Thank you!

My sketchup has been acting buggy and I can now longer import anything into a skp file. I have done this many times but when I go to import from my desktop now, everything is "greyed out", there are no importable files showing. HELP!

did you ever figure this out? I'm having exactly the same problem.

I am having the same problem and it's very annoying! I'm doing some small-scale work and it's nearly impossible to get the guides to appear unless you are at a complete front view, which makes a push/pull impossible as a second step. Does anyone from Sketchup ever comment on these issues or is it more like a gripe board?