The Forums (known as the General Meetings of the Society until the new identity was adopted in February 2011) have been held (admission free) at (and with the support of) the Western Sydney University (Cambelltown Campus), NSW, Australia since the second meeting of the Society in 1996.

The first Macarthur Astronomy Forum was held on 21 February 2011, with a presentation by Professor Fred Watson A.M., Astronomer-In-Charge of the Australian Astronomical Observatory, Siding Springs, NSW, Australia.

International speakers who have addressed the Society: Professional astronomers who have recently addressed the Society include: These astronomers are users of the world's most sophisticated optical, radio, gamma-ray orbital and ground-based telescopes, including the Hubble, Keck, Parkes and the ATNF telescopes.

In Lisa Harvey-Smith's case, she was also the project scientist responsible for Australia's participation in the design of the world's largest-ever radio telescope, the SKA, and the commissioning of its precursor, ASKAP.

In July, 2018, Macarthur Astronomy Forum and The Australian Botanic Garden collaborated to hold "Space Rocks", bringing two international figures, Geoffrey Notkin a meteorite hunter and television presenter from Tucson, Arizona, United States and Amy Shira Teital, a space historian and YouTube presenter from Canada, to Macarthur.