After updating to macOS Sequoia 15.4.1, Adobe Illustrator 29.5 (2025) is experiencing critical issues. When attempting to save as a PDF, it skips artboards, takes an unusually long time to load, and often crashes or shows an “unable to save” error. Saving a copy in .ai format also fails, regardless of location or file setup. Additionally, the “View Using GPU” option is inexplicably greyed out on some files, despite running on compatible hardware. These bugs are severely disrupting workflow and need urgent resolution.