I've installed the Lightroom 6 upgrade to move from Lightroom 5 to Lightroom 6 (Mac El Capitan 10.11.3). When I start LR6 I point it to my LR5 Catalog. I answer "Yes" to the message to upgrade the catalog. It looks like the catalog upgrade works successfully but LR6 just hangs with the spinning icon. The only way out is to "Force Quit". When I restart LR6 it hangs with the credits screen.
I'm familiar with "Check for Update" but how do I update to V6.4 since I can't get LR6 to open successfully in the first place?
you can click on the link that I shared and download the patch for Lightroom 6.4 update and run the installer for it.