How to Uninstall MarsEdit on Mac
Check that blog posts are published or saved on the server, and keep local drafts before removing MarsEdit. The vendor notes that downloaded posts form a local archive; that archive is not proof every unpublished draft exists online. The recorded test used a direct download, not a Homebrew installation.
Remove the app and inspect its data
Save open drafts, then quit MarsEdit and move MarsEdit.app from Applications to Trash. Review its local containers and any MarsEdit-specific group items individually; do not clear a Red Sweater family wildcard. The cask zap uses broad com.red-sweater.* patterns and a group container. Some entries can refer to older MarsEdit identities or another Red Sweater app; inspect owner and contents before any manual zap. Vendor guidance.
After quitting, COPY the whole existing ~/Library/Containers/com.red-sweater.marsedit5 container to an independent private backup outside sync and removal folders and verify the copy; a server archive does not cover unpublished drafts. In Finder, press Shift + Command + G to inspect the following parent folders and select only actual MarsEdit items confirmed to belong to the version being removed, then move unwanted ones to the Trash. Never remove all Red Sweater entries:
~/Library/Application Scripts/com.red-sweater.*~/Library/Application Support/com.apple.sharedfilelist/com.apple.LSSharedFileList.ApplicationRecentDocuments/com.red-sweater.marsedit*~/Library/Caches/com.apple.helpd/Generated/com.red-sweater.marsedit*~/Library/Containers/com.red-sweater.marsedit*
For a * pattern, open the parent folder and select only actual names belonging to the installed app version; a family prefix alone is not proof of ownership.
Keep ~/Library/Group Containers/493CVA9A35.com.red-sweater if another Red Sweater app or MarsEdit copy uses it. Consider removal only after independently backing up wanted contents and confirming every installed owner is gone; otherwise retain it.
Check the result
ls -ld ~/Library/Containers/com.red-sweater.marsedit5 ~/Library/'Group Containers'/493CVA9A35.com.red-sweater
Run this read-only check after quitting the app. A printed path still exists; “No such file or directory” means that path is absent, while a permission error needs its own investigation.
If you installed it with Homebrew
The Homebrew cask has a zap list that includes Red Sweater scripts, containers and group data via broad wildcards; a direct zap requires owner review. Run the command below without --zap if you want to keep those files and inspect them separately. A manual --zap follows the whole cask list regardless of Mole’s checkboxes. Mole skips --zap when its list reaches unchecked or shared data, or a removal scope it cannot verify; selected remnants still follow Mole's own removal flow.
brew uninstall --cask marsedit
What Mole lists
Exact current bundle-ID container rows are normally selected. Shared or historical Red Sweater entries are not automatically claimed by this app and may be protected.
What this test covered
MarsEdit 5.4.5 from the official archive was removed on September 20, 2026. A MarsEdit 4 log path was observed but not attributed to this MarsEdit 5 installation or removed. No blog account was connected.