I encountered someone else having trouble extracting the GS/OS disk images, and rather than look here I decided to try to do things the hard way. It turns out it is quite possible to extract them under Windows after all, if you want to.
The .sea.bin file is, to be precise, a MacBinary-encoded DiskDoubler archive. You can get rid of the MacBinary encoding using this progr am
, specifically by invoking
"macbinconv.exe -mb [whatever].sea.bin -dfrf [whatever].dd [whatever].rsc"
This will put the DiskDoubler archive (without its .sea stub) into [whatever].dd .
It turns out the DiskDoubler archive can in turn be extracted with The UnArchiver
, available for Windows as a command-line utility. In this case you need to run
"unar -k skip [whatever].dd"
The result should be the decompressed disk image.
I was thinking The Unarc hiver (and its Windows port) might be news here, but after a bit of searching it turns out people have posted about it before. I reckon it could be handy in dealing with Stuffit 5 archives and environments where Expander 5 will not run: just use The Unarchiver in Windows to unpack all the files with MacBinary encoding, and then un-MacBinary them using Expander 3 (or whatever) on the Macintosh side.
Also, since we know the archive itself, when completely decoded and unpacked leaves a disk image, why not use StuffIt in Windows, even if it tosses the resource fork, to get the disk image (which does not need a resource fork)?
Of course, this isn't as plausible on files that do need a resource fork (that is, the files after the archive has been decoded and unpacked).