i know that my friend bought a DVR-112D for his Mac and he runs 10.4.10 and its supported (cant tell you when OS X gained support for it). my DVR-110D is OS 9 and OS X bootable, my friends DVR-112D is fully OS 9 and OS X bootable.

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/me has a 112D in his Digital Audio G4 and one in his sister's Gigabit Ethernet G4 as well. They have not given me or her any issues at all and are so quiet.

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you was the friend i was talking about, if you didn't guess

MacJunky what version of OS X gained support for the 112 model, i know it was 10.4.3 that gained support for the 110 models. i would not know what version of tiger if any supported the 115. i dont know when the 115 was made available.