Macro Poly Focus help

[:1]I need a working Macro that allows me to target a mob, press a button, it makes that mob the focus, and allows me to Poly Turtle that mob when I hit my macro button even if I am targeting a different mob to damage. I have tried a few other macros that I have found on here but none work, and my old macro does not work anymore...here is my old macro:

#Showtooltip Polymorph
/clearfocus [target=focus,dead, nomodifier]
/focus [target=focus, noexists] target
/cast [target=focus,harm,exists] Polymorph (Turtle)

but it doesn't seem to work anymore.
I realize that this can be done cleaner, but I use this and it works, so I haven't bothered to see if I could trim it down to less text.

/clearfocus [modifier:shift]
/clearfocus [target=focus,dead]
/clearfocus [target=focus,noexists]
/focus [target=focus,noexists]
/cast [target=focus] Polymorph (replace with whatever spell you want)

After looking at your old one I can't really see why it's not working, though I guess I'm not sure what the "harm" part really does. The exists in the /cast section is unnecessary, because clicking it with no focus will make your current target the focus based on lines higher up, or clears it if you have no current target. Try simply removing the harm and exists portion of the /cast and it may work.

<...> my old macro does not work anymore...here is my old macro:

#Showtooltip Polymorph
/clearfocus [target=focus,dead, nomodifier]
/focus [target=focus, noexists] target
/cast [target=focus,harm,exists] Polymorph (Turtle)

but it doesn't seem to work anymore.

No space after Polymorph. The spell name is Polymorph(Turtle).
#showtooltip [target=focus,harm] [] Polymorph
/stopcasting
/clearfocus [modifier:shift][target=focus,dead][target=focus,noexists]
/focus [target=focus,noexists]
/cast [target=focus] Polymorph

Ok, this macro makes your target your focus and stops casting your current spell to cast polly.
If you hold shift and cast on a new target it makes that target your focus and will auto clear if your focus is dead.
All in one happy macro.