iMac:~ macguffin$ open -n -a /Applications/Spine/Spine.app
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update 3.7.94
open: unrecognized option `
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update'
Usage: open [-e] [-t] [-f] [-W] [-R] [-n] [-g] [-h] [-s <partial SDK name>][-b <bundle identifier>] [-a <application>] [filenames] [
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args arguments]
Help: Open opens files from a shell.
By default, opens each file using the default application for that file.
If the file is in the form of a URL, the file will be opened as a URL.
Options:
-a Opens with the specified application.
-b Opens with the specified application bundle identifier.
-e Opens with TextEdit.
-t Opens with default text editor.
-f Reads input from standard input and opens with TextEdit.
-F
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fresh Launches the app fresh, that is, without restoring windows. Saved persistent state is lost, excluding Untitled documents.
-R,
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reveal Selects in the Finder instead of opening.
also tried
open -n -a /Applications/Spine/Spine.app
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u 3.7.94
if I use
open -n -a /Applications/Spine/Spine.app
it does open