Hi, I upgraded from Sierra to HS and now my Macbook 12" 2015 takes about 1-2 minutes to boot. I think it took about 2-3 minutes to boot earlier today. Normally it takes about 30 seconds after I hit the password to log in and then the desktop shows up. I also have an app that clears the apps disc cache at exit and this would normally take 1-2 seconds but instead takes about 15-30 seconds. Any idea what can be causing this disk issue? Thanks.