I've just downloaded and installed the COMB2 upgrade on my Macbook Pro. Everything seems to have gone according to plan except that when trying to choose COMB2 as a soundset in the active device in Sibelius 6 (i.e. ARIA - either au or vst), I don't get the option to choose COMB2. The only options apparently available are - none, - ARIA, GARRITAN JABB 3.0, or GARRITAN PERSONAL ORCHESTRA 4.
I don't have JABB 3.0 but I do have GPO 4.
COMB2 loads and plays OK in ARIA standalone mode and it's possible to manually load COMB2 instruments into ARIA within in Sibelius but there's no sound.
This may be a Sibelius issue, but I thought I'd check here to see if anyone's had the same problem or if anyone can work out what's happening knows a solution to this.