>> MorphOS, sadly, produces more heat than OS X running on the same machine.

> How come?

This may be (one of) the reason(s):

https://morph.zone/modules/newbb_plus/viewtopic.php?topic_id=9013&forum=11&start=2
https://morph.zone/modules/newbb_plus/viewtopic.php?topic_id=9288&forum=11&start=4