I have finally [re]seen the issue
The error says the initial loader rb can't find:K2WS_Tools\K2_ToolsLoader.rb
Because you are on a MAC that's not a valid file path.
It must be K2WS_Tools/K2_ToolsLoader.rb
to suit MAC AND PCs.
The back-slash \ will scrape through on most PCs, but fail on MACs.
Whereas the forward-slash / will work OK on PCs and MACs.
To fix this open the file loadK2WS_Tools.rb
with TextWrangler or a similar plain-text editor...
See here... viewtopic.php?p=352600#p352600
As reported \ in the require path needs to be a / for MAC compatibility...require 'K2WS_Tools\K2_ToolsLoader.rb'
BUT oddly if you get the latest ZIP off the forum and extract the files loadK2WS_Tools.rb
is correctly formed with the /
Presumably these and a few other issues were reworked by the author after the initial reports/testing in 2011!!
So the question arises where did you get the older incorrect version from ?
Get the latest ZIP from the first post - that is already correctly configured.
Extract its contents and convince yourself about the lack of a \ in the 'require'...
Make sure ALL of the files and subfolder equivalents in the extracted set are manually removed from your users Plugins folder [also check the other Plugins folder in the HD path is similarly emptied too !]
Rename the ZIP with .rbz at the end and use the AutoInstall feature under Preferences > Extensions...
To double check, open the loadK2WS_Tools.rb
and ensure the required path is still with / not \
If it still fails look for other Plugins folders that might be loading an older incorrectly written version ???
For the avoidance of doubt here's a latest working RBZ version too !
You can install that directly...