Mac Pro 6,1 Hypervisor issues

stickytack

New Tinkerer
Oct 28, 2021
4
10
3
Central NJ
www.stickytack.com
I think this is going to end up being a super niche issue. I have a Mac Pro 6,1 with a 12 core 2.7ghz Xeon E5, 64gb ram.

I installed Monterey 12.6.3 on it as well as VMWare Fusion. Created a few VM's. One Windows 10, one OSX 10.10, one 10.15.7

All three VM's have trash network throughput. I have symmetrical gigabit fiber to my house and the VM's on the Mac Pro are showing nothing more than 125mbps. This is with one VM at a time. The Mac Pro itself shows full bandwidth.

HOWEVER I also installed OSX 10.15.7 on this same Mac Pro along with VMWare Fusion and installed the same VM's on it. One Windows 10, one OSX 10.10, one 10.15.7
All three of those VM's as well as the Mac Pro itself show full bandwidth while running a speed test.

Apparently OSX 10.15.7 handles network connections better than 12.6.3? I even purchased the pro version of vmware and it's the same thing.

For reference, I have a couple of Windows server hyper-v hosts and ALL VM's show full bandwidth no matter what.

Anyone have any insight?