I do not know about Mac OSX users, but Stephane, a friend of mine and a Mac user, recently switched from the old MacOS 10.6 to 10.11.6 "El Capitan" and 10.12 "Sierra". Since then, he cannot use his SBIG camera ST-4000, which would not even connect. Strangely enough, his other and more recent SBIG camera, an STT-3200, can connect and it works fine using with MacOS 10.11.6 and the same 4r84 SBIG driver. Is there any newer SBIG driver that would allow using an ST-4000 with MacOS 10.11, or any workaround to make his ST-4000 work with MacOS 10.11 or 10.12 ? Thanks a lot for your help.