ParaView 5.6.2 is a patch release that fixes a trackpad interaction bug on macOS. This version differs from ParaView 5.6.1 only in the version of Qt that has been packaged in the macOS binaries (Qt 5.9.2 instead of Qt 5.12.3) – ParaView’s source code is unchanged. This dependency version change resolves a bug where the ParaView GUI got stuck in zooming interaction mode after holding down the control key and interacting with a Mac trackpad.
Upgrading to 5.6.2 on macOS is encouraged. Upgrading on other platforms is optional. If you have a custom build of 5.6.1, updating to 5.6.2 is not necessary.