Can't delete a file!

Is it still running? The installers will start running as soon as the download completes. If it is still running it won’t let you delete it. However, I think the error message would have stated that.

Try holding down Option key when emptying the Trash. That allows you to delete locked files.

Try deleting from Recovery.

Terminal is in the Utilities menu.

Use the full (absolute) path to your user folder (assuming your home folder is named "mac"

rm -R /Users/mac/.Trash/Install\ macOS\ Sierra.app

Have you restarted since moving it to the Trash? If some part of it is mounted, restarting should unmount it.

If that doesn't work, you can try removing it with Terminal, but I think it might fail for the same issue.

sudo rm -R ~/.Trash/Install\ macOS\ Sierra.app

Try deleting the offending file in safe-boot mode.

Is that install image mounted? I think you might see macOS base system in the side bar

Masky_Mac wrote:

i tried it too! but not worked!

any command in terminal can fix it?

There is, but it will likely have the same issues.

Please take a screenshot of the Sharing & Permissions pane of the Get Info window.

The problem is likely the sentence that reads you have custom access. That means there’s an access control list entry set for that folder that’s probably preventing it from being deleted.

Copy/paste this command into Terminal. Enter your password when requested.

sudo chmod -RN ~/.Trash/Install\ macOS\ Sierra.app

Then try emptying the Trash.

Have you checked all of those items in that list? Did that appear when emptying with Option key held?