To save a reference to Endnote or other citation
manager (e.g., Bibdesk), click on the
... in the lower left-hand corner
of the result you want and select "send to Endnote." This
will download the citation to your computer as a .ris
file. (The seven- or eight-digit number is the article's
pubmed identification number, or PMID.) Then:
Choose File > Import..., and under Import Options, choose Other Filters..., and then PubMed (NLM).enf. You only have to do this once; after that, PubMed (NLM).enf will appear under Import Options. Select the .ris file and hit Import.
Drag the .ris file onto your open Bibdesk library, or choose File > Open... and then choose the .ris file.