I just published SC Uplet version 1.8. This is a first shot at providing a version for Apple Mac OS X, so feedback is more than welcome (contact me here). The documentation provides installation instructions, and itself has undergone some modernization and can now be accessed right from the app itself. There were also some under-the-hood changes to touch up on some minor bugs and to improve the user experience for the new Mac version. And in case more bug spray is needed SC Uplet now checks for updates on start-up, which you can control from the new Preferences dialog box.
If you use SC Uplet on a regular basis, please consider making a donation. My audio upload service for Twitter, called TwUp, provides a handy PayPal button you can use. And with that out of the way, head over to the project page to download the new version.