Apple's OS X, which has been an official certified Unix system for some time now, is often installed onto Internet-exposed or intranet-only Web servers for serving up dynamic content. I've worked with such configurations for a couple of years, and with GNU/Linux alternatives for even longer. There are at least three reasons why GNU/Linux systems do the job better.
Apple's recently released a software development kit (SDK) for the iPhone, but if you were hoping to port or develop original open source software with it, the news isn't good. Code signing and nondisclosure conditions make free software a no-go.
One undeniable sign of progress among Linux distributions is the proliferation of easy-to-use, graphical package management applications. Tools like yum, Synaptic, and CNR are the rule these days rather than the exception. Mac OS X has free software fans, and a well-maintained collection of software at MacPorts, but for a long time those fans have been limited to the command line for finding, installing, and updating the offerings. Now a new utility called Porticus has arrived to present a slick GUI interface to the MacPorts collection, and it could make some converts.
Apple's .Mac service -- commonly known as dotMac -- is a suite of online utilities integrated with OS X. It is wildly popular with Mac owners, but it costs $99 per year. That annual hit to the wallet prompted J. Kent Pepper to commence a bounty-driven contest to create a free, open source replacement: the notMac Challenge. And he has found a winner.
Filesystem in Userspace (FUSE) has long been one of my favorite features on Linux systems. Using FUSE modules, you can mount all sorts of innovative resources -- Gmail, your Flickr photos, a remote SSH server -- directly into your local machine's filesystem and use their contents exactly as if they were normal files. Now you can do the same thing on Mac OS X, courtesy of MacFUSE.
OpenOffice.org released its first native packages for Mac OS X this week. These "development snapshots" aren't intended for end users, but are still an important milestone in porting the productivity suite to the Mac.