The name on this file in the get info box is 2DTools_51_MAC. There is no .zip after it. I added .rbz tonthe file name. When I follow your process I get a dialogue box that says sketchbook was unable to install the extension for some unknown reason.

Okay, I have the. Current version and it has the install button, I downloaded the file for Mac at the top of this post, put it on my desktop, follow the instruction, select the downloaded file from the desktop and nothing happens, still no tools to be seen. Thanks for all your help sofar, pleas bear with me as I become educated here

When I go to the Prefrences>Extensions ther is no option to install extension. What now?

I guess that i did not communicate that very well. I need to know exactly how to get the 2d tool from this forum to load up on sketchup on my mac. I have downloaded the files, now what?

I'm ne wto sketchup and new to forums in general, i also don't know the intricacies of computers so i neeed help getting the 2d tools for my mac to work on sketch up, some detailed help suited to the meanest understanding would be appreciated.
Thanks