Downloaded Mojava a couple weeks ago cause I thought the dark motif and dynamic desktop would be cool. Things were fine the first night, until I noticed my sound wasn't working. Hmm. No big deal, found the answer in some daemon for Boom2 I had to delete from some folder somewhere. Problem solved! Then... I subconsciously notieced boot time was getting longer. Started noticing the beach ball when clicking between apps. Odd since in the five years and one month I have owned this computer this has never happened. Still though, apps and browsers worked. Now, it has progressed from being a laggy nuisance but usable to full blown terminal Mojave. I cannot use my computer for anything. I mean I can technically, if I click on something, walk away for 45 minutes, then come back and click the next thing. I thought it might be the hard drive so I swapped it out (850 evo to 860 evo). The entire process of copying, from installing superduper and then cloning (not including physical hardware installation) took just over 4 hours. Threw in a new battery even though I didn't need one. No dice. It is not the hard drive. Restarted the Vram (or whatever) by holding ctrl+option+p+r. Nothing. Rebooted the thing where you hold ctrl+option+shift+power button for 15 seconds. Interestinly, when I did that it booted up to the user screen at a normal speed, I had high hopes for a second. Then I clicked my user name to sign in and bam! Wheel of death again. Hopes dashed, illusions shattered. I tried to get in to the startup programs to turn them off or remove onces I don't need. Every attempt to get into system preferences times out and fails. I attempted twice to boot in safe mode but I do not have the stamina to hold the shift key down for an hour or longer while it boots. Perhaps tomorrow I will strategically place a can of chili atop a magic marker and try again. I am thinking my only option now is to pray I can spend the next day and a half slowly time machining what documents I've got and then reformat from AFPS (sp?) back to the other format and reinstall High Sierra. I come very close to just buying another macbook tonight. I can't wait five months for the update that fixes this. High Sierra was just fine but nooooooo, I HAD to update so I could have the same OS my xcode tutorial was using. What a smart guy I am! Now look at me. Posting from a $120 ideapad. And I HATE windows. Pathetic.