The 2018 Diagrams app icon, credited to Alexander Käßner, as printed in The macOS App Icon Book on page 58.

The macOS App Icon Book · Printed page 58

Diagrams

This is the Diagrams app icon from 2018, credited to Alexander Käßner, as it appears in the printed The macOS App Icon Book.

Credit: Alexander Käßner ↗
Book: macOS edition
Artwork year: 2018
Printed page: 58

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More versions of Diagrams

The 2020 Diagrams app icon, credited to Alexander Käßner, as printed in The macOS App Icon Book on page 58.