Chosen Solution
my Mac Pro ‘13, only gets as high as 867mhz on the 5ghz band..Based on the info here at the site, it should be 3x3 +1 for BT…that should get 1.3ghz speed…I havent taken it apart to look yet…just wondering if anyones seen this before…
Download and run Speed Test by Ookla from the Apple APP Store and see if you ISP is providing you with enough band width. Try it on other Macs you may have to try to isolate the issue.