AppleScript: How to un-hide the file extension of a screenshot? set filePath to "/Users/Me/Desktop/" &amp; "Screenshot" &amp; ".png"

do shell script "screencapture -mx -T1 " &amp; filePath

tell application "Finder"
    set extension hidden of (filePath as POSIX file) to false
end tell


The above code produces the error:


  Finder got an error: Can’t set extension hidden of file "Macintosh
  HD:Users:Me:Desktop:Screenshot.png" to false.
You were close! You need to use file in front of (filePath as POSIX file), e.g.:

set filePath to "/Users/Me/Desktop/" &amp; "Screenshot" &amp; ".png"

do shell script "screencapture -mx -T1 " &amp; filePath

tell application "Finder"
    set extension hidden of file (filePath as POSIX file) to false
end tell