I've noticed since beta one on the ATV4k that the audio has stearted curtting out regularly for about 3 seconds and about every 10-15 minutes. It started out being once in a while, now it's regularly across all streaming apps (netflix, amazon, disneynow, nickjr, plex). Submitted a bug report on it awhile ago, haven't heard anything back.

With every package I install / deploy I get an error "The package was signed with a certificate that has expired" I view the cert, and it expires in 2020 (Office 2016 15.15.0 patchs). But it's with any .pkg file that i try on 10.11.1 (all betas). Allow from anywhere is selected in Security and Privacy.