Transcoding notch LC on mac super slow

transcoding a notchLC video to ProRes (for editing) is extremely slow on mac - it only utilises one core/two threads.

I can confirm this behavior, encoding on mac is about 5x slower than on PC

after speaking to notch support, there are zero plans working on the encoder speed at the time of this post.

if you are seeing crazy slow encoding speed on a mac, try encoding it on a PC, as with will be several times faster

I’ve found it to be incredibly slow both places and about equally so. Is there something that needs to be done to get this better PC speed? I get roughly realtime in both places. This is also in Media Encoder, which the website claims to be much faster than Premiere/After Effects.

Comparing an M1 Max mac to a PC with an i9-14900K and rtx4090.
25 minute source I get about 23 minutes from the M1 and 20 from the PC

For context that same PC will encode that file to MP4 in about 14 minutes and ProResHQ in about 9.