To run Lightroom Classic 2019 on a Mac, the following were generally required:
Version 8 added support for the HEIC format used by iPhones, including "Depth Range Masking" which uses depth data from Portrait Mode photos to create precise local adjustments. Adobe Photoshop Lightroom Classic CC 2019 V8.1 Mac
Warning: Local Adjustments detected in the future. Brush strokes from 2026 have been found on a 1921 original. Do you want to Overwrite History? [Yes] / [No, but also not yet]. To run Lightroom Classic 2019 on a Mac,
The Develop module in V8.1 also saw refinements to the Process Version (PV5). This improved the way the software handled high-ISO noise and shadow recovery, giving Mac users more latitude when pushing the limits of their RAW files. Why Version 8.1 Matters for Mac Users Do you want to Overwrite History
: A new option allowed users to hide "partially compatible" presets, ensuring only those that worked perfectly with the current photo’s profile were visible.