Downloaded track on my iOS is not fully downloaded on my mac.

If you are using iTunes Match (which I assume you are as that is the page that you've posted from) then have you tried deleting the track and redownloading it (or copying it from your device) ?

Or is it a new purchase ? If it is then you could either try deleting it from your Mac and copy it back from your device via File > Devices > Transfer Purchases, or you might be able to redownload it via the Purchased link under Quicklinks on the right-hand side of the iTunes store home page on your Mac's iTunes

What are you getting as the error message ? And the full track plays on your iOS device - and deleting the incomplete track from your Mac's iTunes library, connecting the iOS device to it and the Transfer Purchases doesn't copy that complete track over to your Mac ?

If the full track isn't on your device either then there might be something wrong with the track at Apple's end, you could try the 'report a problem' page to contact iTunes Support : http://reportaproblem.apple.com

If the 'report a problem' link doesn't work then you can try contacting iTunes support via this page : http://www.apple.com/support/itunes/contact/- click on Contact iTunes Store Support on the right-hand side of the page, then Purchases, Billing & Redemption

If iTunes Match, automatic downloads or previous purchases are redownloaded from an account then the computer or device may start a 90 day association with that account : http://support.apple.com/kb/HT4627 . You could try contacting iTunes Support via the contact page and see if they can remove the association.