Sony's tech support has stated that no version of the GDM-1901 will work on
any Macintosh.
The GDM-1901 was an OEM product from Sony to a variety of vendors. It is
now an obsolete product. When these were manufactured each vendor
specified their requirements for timing to Sony; thus, each vendor's
version of the GDM-1901 is specific to that vendor's computer system. To
find out more about a particular vendor's version, contact Sony's monitor
tech support at 408-944-4181.
For more information, search under: "Sony"