I have created a DMG file and need to distribute it with a public link. Please note that the dmg file opens properly on all the macs if I transfer it through commandline scp (OpenSSH
).
However, if I upload the same DMG
file to Google Drive
or AWS S3
, and then redownload it to the same mac, it says the app has been damaged.
What attributes change when the file is uploaded to Google Drive
or AWS S3
?
Update-1
Working DMG attibutes:
Non Working DMG attributes:
Tried removing all attibutes by using xattr -cr . Yet the working dmg works, and the non-working dmg doesn't work
MacOS sometimes adds the quarantine attribute if it doesn't trusts the app even though it is signed.
Check it by running xattr /path/to/app.app
in the terminal
if it contains the 'com.apple.quarantine' attribute, then probably you will get the above error in a dialogue-box.
To remove the attribute, run the below command before opening your DMG/App
xattr -d com.apple.quarantine /path/to/app.app
To completely avoid this hassle, the app must be notarized.
References: