You know the sad part about this is that the issue still exists in the latest firmware v27.7.1 - Just ran through a rigmarole of troubleshooting steps on my end all the way from rebuilding our radius & CA infra to remove any potential KB conflicts on Microsoft's end - OS X users on current model MBPs could not maintain a stable connection to our campus wireless due to radius auth flapping. Downgrading our entire org to 26.6.1 for our MR53/MR55 and 26.8 for MR56 seemingly resolved this issue. After speaking to several Meraki engineers they had advised me that staying on older firmware is not a long term solution, however, unless the radius authentication problem is actually fixed in a future firmware update - our campus will not be moving off of the v26 flavor of MR firmware.
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