Updated list: 
http://bit.ly/2WWQfrO
https://community.teamviewer.com/t5/Knowledge-Base/Which-operating-systems-are-supported/ta-p/24141

Mac 10.11 (El Capitan) up - TV14
Mac 10.6 up - TV9
Mac 10.5 - TV8
Mac 10.4 - TV6

Win Vista up - TV14
Win XP SP3 - TV13
Win 2000 SP4 - TV8
Win 98/Me/NT - TV6


## Windows
Windows 98	 	TeamViewer 4-6
Windows ME	 	TeamViewer 4-6
Windows NT 4.0 SP6a	 	TeamViewer 4-6
Windows 2000 SP4	Server 2000	TeamViewer 4-8
Windows XP SP3 ¹	Server 2003 ¹	TeamViewer 4-14
Windows Vista ¹	Server 2008 ¹	TeamViewer 4-14
Windows 7	Server 2008 R2	TeamViewer 4-14
Windows 8.0	Server 2012	TeamViewer 7-14
Windows 8.1	Server 2012 R2	TeamViewer 9-14
Windows 10 v1507 (RTM) TeamViewer 10-14
Windows 10 v1607 (Anniversary Update), Server 2016	TeamViewer 11-14
Windows 10 v1703 (Creators Update) 	TeamViewer 11-14
Windows 10 v1709 (Fall Creators Update) ²	 	TeamViewer 12-14
Windows 10 v1803 (April 2018 Update) ²	 	TeamViewer 13-14
Windows 10 v1809 (October 2018 Update) ²	 	TeamViewer 14

## Mac
Mac OS X 10.4 (Tiger)	TeamViewer 4-7
Mac OS X 10.5 (Leopard)	TeamViewer 5-7
Mac OS X 10.6 (Snow Leopard)	TeamViewer 6-9
Mac OS X 10.7 (Lion)	TeamViewer 6-11
OS X 10.8 (Mountain Lion)	TeamViewer 7-12
OS X 10.9 (Mavericks)	TeamViewer 9-12
OS X 10.10 (Yosemite)	TeamViewer 10-13
OS X 10.11 (El Capitan)	TeamViewer 10-14
macOS 10.12 (Sierra)	TeamViewer 11-14
macOS 10.13 (High Sierra)	TeamViewer 12-14
macOS 10.14 (Mojave)	TeamViewer 14