Visit the pages below for information about upgrading to legacy versions which are no longer the current full release or beta release version of Unity.
Note: The documentation for these versions is frozen - we do not correct, update or republish it.
The 2018.x and 2019.x Tech release guides have been compiled into the LTS guides. You can still view the version specific guides in their own section of the documentation such as the 2019.1 guide here.
Upgrading to Unity 2017.3 [Released 19 December 2017] - [Public beta 25 September 2017]
Upgrading to Unity 2017.2 [Released 12 October 2017] - [Public beta 14 July 2017]
Upgrading to Unity 2017.1 [Released 12 July 2017] - [Public beta 11 April 2017]
Upgrading to Unity 5.6 [Released 31 March 2017] - [Public beta 12 December 2016]
Upgrading to Unity 5.5 [Released 30 November 2016] - [Public beta 29 August 2016]
Upgrading to Unity 5.4 [Released 28 July 2016] - [Public beta 14 March 2016]
Upgrading to Unity 5.3 [Released 08 December 2015]
Upgrading to Unity 5.2 [Released 08 September 2015]
Upgrading to Unity 5.0 [Released 03 March 2015]
Upgrading to Unity 4.0 [Released 13 November 2012]
Upgrading to Unity 3.5 [Released 14 February 2012]