Main | Inserting multiple rows in SQL Server and moving data from MySQL »

Apple application error

This error will appear sometimes when you launch software that has been downloaded: "[Program] is an application which was downloaded from the Internet. Are you sure you want to open it?"

ThunderbirdError.png

It is caused by extended attributes on the application and it can happen on many programs, including Firefox and Thunderbird. Here's how to fix it:

1. open terminal
2. su to admin
3. cd /Applications
4. xattr -d com.apple.quarantine Thunderbird.app
5. repeat for other applications that have extended attribs

You can check which apps contain these attribs by doing an ls -lsa. You'll see "@" on the far right of the file's permissions listing. Additionally, you can check the attribs on each file by doing a xattr -l [file/dir].