(Icons were glitched first like el capitan but after installing nvidia drivers for 10.12.6 (sierra) icons did fix to be correct.
I didn't bother Transmac so i used next one inside os x...
To Convert dmg to img-
hdiutil convert SierraAMD.dmg -format UFBI -o SierraAMD.img
to Transfer img to your usb/sd card (i had it disk4 - check yours):
sudo dd bs=2048 if=SierraAMD.img of=/dev/disk4
(this takes hours at least for me for sd card 32gb and it won't notify about progress.. just shows password question as it did ask it for sudo -- until finished)
..left installing over night.