Acorn 8.2 is released; update via menu or App Store. Key features include improved image diffing with overlays, non-destructive multi-stop gradient filters, and numerous minor enhancements inspired by the developer's injury. New icons for blend modes, smart layer export options, and a preference tab named “Mueller” for personal tweaks were added. It now supports saving flattened composites of layers in .acorn files. Also, Acorn 8.2 is compatible with macOS 14 and is working towards full support for macOS 26 Tahoe.
http://flyingmeat.com/blog/archives/2025/9/acorn_8.2_and_tahoe_plans.html

