Arch Linux

MCabber is in the community package repositories. Just enable it and install via pacman:

pacman -S mcabber

Debian

Mario Iseli is maintaining an official Debian package, which was successfully released with Debian Etch on 08 Apr 2007 (0.8.3). Note: After installing the package, you need to set up a personal configuration file; see the documentation and the sample mcabberrc file in the /usr/share/doc/mcabber/ directory. See the Debian mcabber package page.

Fresh mcabber versions for stable and oldstable distributions also available here.

Ubuntu

Debian packages by Mario Iseli are synced to Ubuntu. See the Ubuntu mcabber package page.

Fresh mcabber versions for stable and oldstable LTS distributions also available here.

Red Hat / Fedora

For Red Hat/Fedora Core users, Dries Verachtert is building a set of RPM packages. You can find them here or here.

Michael Fleming is also maintaining packages for Fedora Core 6 (in Fedora Extras) as well as Fedora 7 and up (in the core "Everything" repository)

You only need to enable the Fedora Extras repository for Core 6 to get access - no extra configuration is needed for Fedora 7+. yum install mcabber installs the package and it's dependencies.

Slackware

Thanks to Eric Hameleers, mcabber is now officially part of Slackware.

Gentoo

Thanks to Philip M. White, there is now an official Gentoo Portage.

If you want to use the development version found on the Mercurial repository, you can use the Berkano Overlay. You can browse the overlay too.

FreeBSD

Vsevolod Stakhov has created a FreeBSD port.

OpenBSD

There is an OpenBSD port, currently maintained by Markus Hennecke:

pkg_add mcabber

pkgsrc

MCabber is also available in pkgsrc. However, it's only available pkgsrc-wip till now.

Optware

Cross compiled ipk for small NAS devices to be installed under /opt. See Optware.

Mac OS X

There is a mcabber Fink package in the Fink unstable tree.

There is also a port available in the MacPorts repository.

Remember that you need to press the additional SHIFT key on Mac OS X for PageDown. That means FN-SHIFT-CursorDown for moving in the roster.