So I got the 2012 Macbook Pro with Retina display (2.6 ghz, 512 gb, 8gb RAM) laptop when it came out and recently had to wipe it and restore to factory settings because I had some bad kernel packets that were causing my machine to take 5 min+ to boot up. After getting it back through the mail (also had the screen replaced due to image retention) I ran through normal setup, downloaded the applications I needed, and started using it. PDF files lag extremely hard, both in Safari and within Adobe Reader after being downloaded. I recall it being laggy, but not this laggy. I tried looking up some possible solutions online including downloading RightZoom and making sure Adobe was excluded as well as fiddling with Adobe Reader settings. I also checked to make sure I have the latest version of AR (11.0.3). Nothing has helped. I am just starting my PhD program and I will be doing tons of research, mostly reading PDF files. Any help on how to fix this issue or any workarounds would be greatly appreciated.