just:in mac offers increased performance and stability for UHD recordings. You can now record multiple UHD Channels on one machine in 8/10-Bit Video mode, depending on the macOS model and codec/container option.
Apple ProRes (mov)
Avid DNxHR (mxf)
h.264 (mp4 and mov)
just:in mac will not convert any color space, it will check the color space of the incoming signal and will use it for the recordings.