Red Sweater Software released MarsEdit 4.1.4 with preliminary support for Dark mode in macOS 10.14 Mojave, including using different syntax highlighting colors and tweaking text colors for the Network Log’s content. The blog editor also fixes a bug that prevented some preference changes from sticking, restores support for dragging images from Preview’s thumbnail list to the app, and resolves a problem converting emoji characters from entities and back.
Shortly after this release, Red Sweater pushed out version 4.1.5 to correct a bug introduced in version 4.1.4 that prevented the editor windows from being resized smaller than their initial size. And then 4.1.6 resolved a problem with uploading featured images. ($49.95 new from Red Sweater Software or the Mac App Store, 15.1 MB, release notes, macOS 10.12+)