This is perfect methinks. Just not a Mac unfortunately
https://octavetech.eu/
Hmmm. Brings back bad memories of now defunct Muse Receptors. Mine hit the junk yard about a year ago. 4 cores is not exactly state of the art today. FYI: Synthogy III requires 8 cores
“The unit features 16GB of RAM, a 256GB NVME M.2 SSD, 24-bit 192 kHz studio-quality recording, 2 inputs (XLR/Line combo +Line/Hi-Z), an Ethernet port, 4 USB 3.0 ports, 1 USB-C, 1 Mini-SD card slot.”
Keyboard players might consider this sub-standard, especially the storage/RAM. For me (guitar player, but there I also use drum-tracks) the unit doesn’t have enough outputs, so I would have to use an external interface.
This could have it’s uses - although I think they may have missed a trick by not including some rotary encoders on the front panel rather than solely relying on the touch screen.
Having all the kit you need in one box is great - but perhaps also kind of a downside unless it’s upgradeable.