As far as managing LANDesk devices from a Mac there really aren't a whole lot of options. Really all you can do is use the web console or use the win console installed in a virtual machine. If you are finding that this does not meet your needs let me encourage you to add what you would like to see to the Enhancement Requests section of the Community.
There is a navigation bar on the left side of the community landing page that has a link called Enhancement Requests or you can click here.
Another option is to use Microsoft's RDC software to log on to the core itself. It's optimal if you want to manage the settings on the core, apply service packs to the OS, or check the event viewer for errors, and such...
It's not so good if you don't have any/enough RDC licenses for 1 or more RDC connections.