For me, the only thing that works on a less temporary basis is to go into Safari preferences and disable the extension for a second then re-enable it.
Shoeless356 Wrote:I just downloaded the UNIVERSAL installer for Mac (the one at the top of the download list that has the black Apple logo next to it). It downloaded, launched and installed and seems to be working on Safari now. To keep you from having to go back to Page 5 to look for the download link, here it is:
https://lastpass.com/misc_download2.php
Hope this is helpful!