Since Creative Cloud 2017 is considered a "legacy" app, Adobe hides it by default. Here is how to legally install it (requires an active Creative Cloud subscription that includes Illustrator).
With the rise of touch-enabled devices and Microsoft Surface tablets (and to a lesser extent, the iPad Pro which was emerging at the time), Adobe introduced a "Touch" workspace. While Mac desktops have traditionally been mouse-and-keyboard driven, this feature anticipated the hybrid future of design, allowing for a simplified, gesture-based interface. Adobe Illustrator Cc 2017 For Mac
Adobe Illustrator CC 2017 (v21.0) remains a significant release in the evolution of vector graphics software, particularly for Mac users. Originally launched in late 2016, this version introduced a modernized user interface and specialized tools for web and UI design that laid the groundwork for today's design standards. Since Creative Cloud 2017 is considered a "legacy"