Getting the path of the original is not really difficult.
(* http://www.macscripter.net/viewtopic.php?id=45852 *)
set brokenAliasPOSIXPath to "/Volumes/Macintosh HD/Users/Important/Téléchargements/ achetés/maj_Apple Leopard"
set aFile to POSIX file brokenAliasPOSIXPath
set aFile to (aFile as text) as alias
tell application "Finder"
set theWindows to every window
repeat with awindow in theWindows
# Close every info window
if class of awindow is information window then close awindow
end repeat
select aFile
repeat 10 times
if ((get selection) as alias) = aFile then exit repeat # Wait for the window containing the file
delay 0.2
end repeat
end tell
tell application "System Events" to tell process "Finder"
set frontmost to true
keystroke "i" using {command down} # Ask for Info window
tell application "Finder"
repeat 10 times # Wait for the new info window
delay 0.2
if class of window 1 is information window then exit repeat
end repeat
end tell
tell window 1
--class of UI elements --> {scroll area, button, button, button, image, static text}
tell scroll area 1
--class of UI elements --> {image, static text, static text, static text, static text, scroll area, UI element, static text, static text, static text, static text, static text, static text, static text, static text, static text, static text, static text, static text, static text, static text, button, checkbox, UI element, static text, static text, UI element, static text, text field, checkbox, UI element, static text, UI element, static text, UI element, static text, static text, scroll area, button, button, menu button, checkbox}
set theTexts to value of static texts
repeat with i from 1 to count theTexts
if theTexts's item i = "Original :" then
set theOriginal to theTexts's item (i + 1)
exit repeat
end if
end repeat
end tell
-- subrole of buttons --> {"AXCloseButton", "AXZoomButton", "AXMinimizeButton"}
click button 1 # Close the Infos window
end tell # window 1
end tell
theOriginal --> "/Important/Téléchargements/ téléchargés pour Leopard/maj_Apple"
CAUTION: Macintosh HD isn’t my boot volume.
Edited the test checking for availability of the Info window whose title is a localized string.
Yvan KOENIG running Sierra 10.12.6 in French (VALLAURIS, France) mardi 25 juillet 2017 12:34:10