2012 (Main version) with updates through 2014.

Originally released as a standalone product, Adobe officially ended support for CS6 in 2014. Key Features and Enhancements

is the ultimate performance update for the final "Creative Suite" release of Adobe's legendary vector graphics software. While newer Creative Cloud (CC) versions exist, CS6 remains highly sought after for its speed, stability, and the fact that it was the last version available before Adobe moved to a strict subscription-only model. Overview of Version 16.2.0

The 16.2.0 update focused on refining the breakthrough features introduced in the initial CS6 launch: Illustrator (CS6) - Adobe Security Bulletin

Native 64-bit support for both Windows and macOS.