After a BLAST search, you can retrieve matching sequences from the Description List results tab. What you may not know is that you can do a similar thing from the Aligned Sequences result tab.
One advantage of this approach is that (as in the example above) sometimes there are multiple accession numbers for a hit. Simply select all of the rows containing accession numbers you are interested in, then choose Database | Retrieve to Desktop to download those sequences and open them as windows in MacVector. Alternatively, Database | Retrieve to Disk can be used to download and save them to a folder on your hard drive.