So I've got a Mac Air 2013 11" model. For awhile now, I've noticed when typing that things freeze up a bit, or more accurately, freeze for several seconds, then produce the letters I typed. This seems to happen most often in yahoo when writing emails, but then, that is what I usually do the most so perhaps I notice it there the most. Often while doing that, or visiting websites, the beachball will appear, and I have to wait and wait. This happens more often in Safari than Chrome I believe. I had thought it might be do to me using a a very old OS, like 10.8 or whatever came with it, but I finally updated to High Sierra today and the problem is still happening. What might cause this, and how can I fix? Bonus points for also telling me how I can make the address bar longer/wider, and the back button bigger in High Sierra. My old eyes preferred the much bigger back button I somehow had with the older OS. Thanks!