Thomas,
there is a free application called TinkerTool (http://www.bresink.com/osx/TinkerTool.html) .
It allows for adjusting a couple of preference settings that are hidden. Among other things you can change Fonts and Font sizes.
TinkerTool is also useful for exploring all of the osx directories without having to resort to the command line.
All of the changes can be reversed with one click.

Thomas, my apologies for having bothered you without testing more thoroughly beforehand!
Although the error is reproducable, it is limited to geometry that has rounded corners in combination with an offset of the shell, that is close to or greater than the offset of the rounded corners.
I have attached a sample model with some tests - the red shape produces the error.

shell_test.skp

Thanks Thomas, this plugin is very useful!
However, I don't seem to be able to commit after typing a thickness.
The shell is generated, but neither double-clicking or Return finishes off the process.
The space tab brings me back to the selection tool, but the already generated shell is lost.
Ruby console reads:

Error: #<ArgumentError: Cannot convert argument to Sketchup::Point3d>
/Library/Application Support/Google SketchUp 8/SketchUp/Plugins/tt_shell.rb:401:in add_face' /Library/Application Support/Google SketchUp 8/SketchUp/Plugins/tt_shell.rb:401:in add_border_face'
/Library/Application Support/Google SketchUp 8/SketchUp/Plugins/tt_shell.rb:381:in shell' /Library/Application Support/Google SketchUp 8/SketchUp/Plugins/tt_shell.rb:374:in each'
/Library/Application Support/Google SketchUp 8/SketchUp/Plugins/tt_shell.rb:374:in shell' /Library/Application Support/Google SketchUp 8/SketchUp/Plugins/tt_shell.rb:362:in each'
/Library/Application Support/Google SketchUp 8/SketchUp/Plugins/tt_shell.rb:362:in shell' /Library/Application Support/Google SketchUp 8/SketchUp/Plugins/tt_shell.rb:321:in offset_mesh'
/Library/Application Support/Google SketchUp 8/SketchUp/Plugins/tt_shell.rb:319:in each' /Library/Application Support/Google SketchUp 8/SketchUp/Plugins/tt_shell.rb:319:in offset_mesh'
/Library/Application Support/Google SketchUp 8/SketchUp/Plugins/tt_shell.rb:188:in `onLButtonDoubleClick'
/Library/Application Support/Google SketchUp 8/SketchUp/Plugins/tt_shell.rb:328

Yes, it does!
Thanks to your persistence in solving the problem.

TIG,
on a MAC, the pathname always starts with a '/' because that's the root directory. Volumes follow behind that slash.
Oxer stated two alternative Pathnames on his Mac earlier in this thread, the second of which started with "Library/...".
It should really read "**/**Library/...".
Hope I don't come across as beeing pedantic; maybe it helps avoiding similar problems in the future.

Flawless !!!
It now runs without Interruptions. Prefect results - especially with the ImageTrimmer-Simplifier afterwards.
Thanks a lot TIG et al !
If it is not too complicated I would be interested, what the problem was running the scripts on the mac.
Thanks again

Thank you,

I am fiddling with the settings already, with no luck so far.
I did a quick google search for "setting java permissions osx" and that opens up a whole new scary landscape for me, which I am not sure I should embark upon right now.

thanks for the quick reply,

the "EdgeDetector.jar" file has already the correct Properties.
There is an application called Java-preferences in the utilities folder, but I am nut sure which settings I should change.
It has Settings for Security, Network and - I'm trying to translate since my OS is in german - two options for:
"Run applets" > 1) "within own Process" or 2) "within browser process"
Does that have any relevance?

Hello TIG,

I have been reading the whole thread, but I am still not sure, if you have finally been able to resolve the "mac glitches" with OXER.
On my Mac (Snow Leopard 1.6.6) ImageTrimmer gets stuck with an error message.
This is what I do:

After importing and selecting the "test.png" I run ImageTrimmer.
The ruby creates a folder named TrimmedImages containing the selected image.
Also the two .ini files containing the following Pathnames:

/Users/kai/Desktop/TrimmedImages/test.png
/Users/kai/Desktop/TrimmedImages/test

The Ruby Console produces an error message (see first screenshot)

On double-clicking edgeDetector.jar in the SKMtools folder two more files are generated in the TrimmedImages folder:
testEdges].dat
test[Edges].png
the .dat file containing zeros and ones, and the second .png showing the desired contour (second and third screenshot)

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Since this is my first post on this forum I don't want it to lack my appreciation for all of the plugin writers, whose contributions I have been so shamelessly enjoying over the past years. Thanks a lot to all of you!!!
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