Hi Woody Aki,
I'm connecting Cyclic with the IAC-Driver in my Audio Midi Set-Up and Environment in Logic. Both, Hard-and Software Synths. Hardware via External Instrument and Software normal as Software Instrument in Logic.
In Cyclic I select 'to Cyclic' by external Midi clock and 'from Cyclic' by Midi Device to get Midi Notes when recording in Logic.
Sorry, I don't know how it works in Cubase or other DAW's. In Studio One (V2) and Reaper I will test it the next Day's.
But so far, in Logic all runs fine.
Thesys from Sugar Bytes offers the same as Cyclic. As Plugin and Standalone too: Sugar Bytes Thesys
But for higher costs, however with some more Possibilities. Works fine too here.