All releases with the same version number have the same feature set across all supported platforms. There will be some visual differences due to the different windowing systems used. Please let us know if you notice a behavioral difference.
You can see which version of Chimera you are running by choosing About UCSF Chimera from the Help menu.
Release notes are added as new versions are released. The current release history and release notes can be viewed at http://www.cgl.ucsf.edu/chimera/docs/relnotes.html.
Version Status Release Date 1.14 production 12 November 2019 1.13.1 production 17 November 2018 1.13 production 2 July 2018 1.12 production 24 October 2017 1.11.2 production 1 December 2016 1.11 production 14 July 2016 1.10.2 production 23 July 2015 1.10.1 production 8 January 2015 1.10 production 5 November 2014 1.9 production 12 May 2014 1.8.1 production 31 October 2013 1.8 production 7 June 2013 1.7 production 30 January 2013 1.6.2 production 6 July 2012 1.6.1 production 13 March 2012 1.6 production 29 February 2012 1.5.3 production 24 May 2011 1.5.2 production 25 January 2011 1.5.1 production 12 January 2011 1.5 production 11 December 2010 1.4.1 production 6 April 2010 1.4 production 3 December 2009 1.3 production 1 December 2008 1.0 build 2540 production 9 July 2008 1.0 build 2470 production 15 November 2007 1.0 build 2422 production 21 June 2007 1.0 build 2417 production 30 May 2007 1.0 build 2304 production 16 October 2006 1.0 build 2199 production 17 February 2006 1.0 build 2184 production 31 October 2005 1.0 build 2181 production 20 October 2005 1.0 build 2180 production 12 October 2005 1.0 build 2065 production 17 December 2004 1.0 build 2038 production 19 October 2004 1.0 build 2029 snapshot 7 October 2004 1.0 build 1951 production 13 May 2004 1.0 build 1872 production 27 October 2003 1.0 build 1700 production 27 March 2003 1.0 build 1602 beta 6 November 2002 1.0 build 1516 beta 3 July 2002 1.0 build 1442 beta 10 April 2002 1.0 build 1430 beta 10 March 2002 1.0 build 1389 alpha 17 January 2002 1.0 build 1351 alpha 1 November 2001 1.0 build 1298 alpha 10 September 2001 1.0 build 1182 alpha 20 June 2001 1.0 build 1050 alpha 23 February 2001 1.0 build 1001 alpha 1 February 2001 1.0 build 938 alpha 14 November 2000 1.0 build 634 alpha 7 August 2000 1.0 build 388 alpha 27 June 2000 1.0 build 154 alpha 3 March 2000