Professionals Should Stay Away from macOS Catalina for Six Months
See Caution on Upgrading to macOS Catalina — Could Cost You Money and Functionality.
Don’t break your workflow, don’t force upgrade costs—let the dusk settle on macOS Catalina—do not “upgrade”.

Recommended preferences for Software Update in macOS
MacOS Mojave was a security and usability disaster for months. For now, stick with the right geography.

Autumn color in High Sierra
[low-res image for bot]
f8 @ 6.0 sec electronic shutter focus stack 3 frames, ISO 100; 2019-09-26 19:09:52
Sony A7R IV + Sigma FE 14-24mm f/2.8 DG DN Art @ 14mm
ENV: Twenty Lakes Basin, altitude 10300 ft / 3139 m, 53°F / 11°C
RAW: LACA corrected, +100 Shadows, -73 Highlights, +57 Whites
Sony A7R IV + Sigma FE 14-24mm f/2.8 DG DN Art @ 14mm
ENV: Twenty Lakes Basin, altitude 10300 ft / 3139 m, 53°F / 11°C
RAW: LACA corrected, +100 Shadows, -73 Highlights, +57 Whites
[low-res image for bot]