Download Allen Edwall's AstroWin v.1.6 (includes Horary Analyser). Installation instructions included on separate readme file (please read now and copy or print out for future reference). Please not that we do not offer further support on installation or usage. Please address all queries to the software author.
This program will cast and store birthcharts, but please not that it does not include a gazetteer of latitudes and longitudes for birthplaces, nor time zone correction - you will need to visit Astrodienst Time Zone Atlas to find these out. You may wonder why bother with AstroWin at all if you have access to the chart calculation facility at www.astro.com - the answer is that you can store unlimited charts with Astrowin but only four on the astro.com website, unless you pay a modest subscription fee.
For newer versions of Astrowin, please visit www.astrowin.org . Please note that versions after 1.6 do not include the Horary Analyser, now sold commercially. On Allen's site he has a variety of free of inexpensive astrology software, and there are some very interesting articles.
The longest-standing Mac astrology program has fully-customisable screen display and chart output options (design your own with drag-and-drop), solar returns, transits, synastry, midpoints, world atlas etc. and 3000 charts of famous people included. The program is modular, so you can add real time charts, astrocartography and interpretation (US English). It can work out expensive, though you can check for special offers. No demo.
There are basic, standard and advanced packages, making it a serious competitor for Io - it has more features and works out a lot cheaper. The basic package for $49.95 covers all the fundamental charts and may be all you need. Other packages include interpretations (in US English though). For an experienced Mac user, the drawback is it looks like a Windows program ported to the Mac - which it is. So you may not be able to live with the look and feel of the charts. You can download a free demo.
Despite its name, this does run in English ! For $59 you get a great-looking Mac programme that does all the basics, including running time forwards and back. Less control over chart output and not so many features as even the basic package of Time Passages. You can download a free demo. Note : current version requires at least OSX 10.5.
Extensive range of features - it includes 11000 asteroids, centaurs and extra aspects (biseptiles anybody?) not in any other Mac software. Produces clean-looking simple graphics, but data entry can take a little while to get used to. There is a downloadable demo, but for continued use you have to register and pay $35.
Does all the basic stuff for about £20 - no particular emphasis on centaurs by the way - natal, solar return, bi-wheel, no transit print outs at present. Some users have reported it difficult to work out how to use - there is a demo here. Available on AppStore.