hi @stevebaer i just have figured that Rhino does not perform well with large meshes on a Radeon in a Macbook Pro from 2015 in shaded mode, in a direct comparison with a Macbook Pro from 2013 which uses the NVIDIA performs far better. in all other display modes the radeon feels like it actually is better again, i made absolutely sure that both computer enjoyed the exact same conditions.
the Radeon had
Time to regen viewport 100 times = 9.95 seconds. (10.05 FPS)
while the 2 year older NVIDIA
Time to regen viewport 100 times = 3.24 seconds. (30.87 FPS)
here both set ups
and here the file i used to test
large mesh.3dm (3.0 MB)
i am kind of begging for a fast response, because i am in the process of selling one of the 2 computers and have to decide, thanks in advance.
edit: oh and i am using 6.18.19239.01072, 2019-08-27