Upgrading Security to MacOS Sierra https://isc.sans.edu/forums/diary/Getting+Ready+for+macOS+Sierra+Upgrade+Securely/21465/) PCI PIN Transation Security / Point of Interaction Update https://www.pcisecuritystandards.org/documents/PCI_PTS_POI_SRs_v5.pdf) IMAPS Scans https://isc.sans.edu/forums/diary/Ongoing+IMAP+Scan+Anyone+Else/21463/)