TinkerTool 6 is compatible with Sierra as is TinkerTool System 5. There is a Sierra edition of Cocktail. (Click on the Download button to see all available versions.) In addition, Logitech has introduced Sierra compatibility to several of its drivers.
Jon
macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365
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