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I re-downloaded the OS X Lion installer app to burn a DVD. After burning the DVD I put the installer files in the trash. Now when I try to clear the trash, I get a message basically saying I only have Read Only permissions on the file, and can't delete it. The permissions don't appear to be editable. How can I get rid of the file?

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up vote 2 down vote accepted

Have you tried rebooting before removing it from Trash again? That helps in such cases sometimes.

If that doesn't work, try opening Terminal, and entering:

cd .Trash
sudo rm Install\ Mac\ OS\ X\
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Rebooting did it - thanks! – dsteele Aug 6 '11 at 2:53

You can also force quit (press Command ⌘ + Option ⌥ + Escape ⎋ keys then select the application from the list) the application used to burn the Lion installer since this locked access to the file thus cannot be completely deleted.

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