Apple quarantine warning

Bike Outliner
1

I’m seeing an unusual quarantine behavior with Bike on macOS 26.6.2.

When I create a new Markdown file in Bike, the file receives a com.apple.quarantine extended attribute:

com.apple.quarantine: 0082;...;Bike;

For example, a completely new .md file created with Bike shows:

com.apple.quarantine: 0082;6a9fdad9;Bike;

If I then go to Finder → Get Info → Open with and select Bike for that individual file, macOS displays this warning:

Apple could not verify “[filename].md” is free of malware that may harm your Mac or compromise your privacy.

The file itself is just a normal Markdown file created by Bike.

Removing only the quarantine attribute:

xattr -d com.apple.quarantine "/path/to/file.md"

makes the problem go away.

I reproduced this with both Bike 2 Preview and Bike 1.22.2 from the Mac App Store

A completely new file created with the Mac App Store version also receives:

com.apple.quarantine: 0082;...;Bike;

Is Bike intentionally causing newly created documents to receive the 0082 quarantine attribute, or could this be an interaction between Bike’s document handling and macOS 26?

  • macOS 26.6.2
  • Bike 2 Preview (301)
  • Bike 1.22.2 (Mac App Store)
2

I think that’s normal system behavior… at least I don’t believe Bike is don’t anything special related to quarantine when writing files, and I see other apps doing the same thing. For example when I save a new file with MarkEdit it adds xattr (or really system frameworks add I think):

com.apple.quarantine: 0082;6a9ff8e6;MarkEdit;

Why exactly? I don’t know, but seems expected.

…

This part on other hand seems wrong, but I also can’t reproduce it:

Anyone else know what could be going on here?

Jesse

3

I’ve seen a report of this at TidBITS Talk, albeit for webarchive files. I’m not sure there was a solution.

https://talk.tidbits.com/t/did-apple-deliberately-break-webarchives/33640

Both bike and webarchive involve html.

What Safari are you running?

What files are registered for Quick Look on the problematic files? I’m wondering if there’s a newly installed app creating problems. Guide

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