What brought you back to el cap, what hardware you running, and will you be willing to give sierra a try again in due time ? For me I've been on sierra since the betas for better or worse (worse), but i have a 40gb el cap partition, and 40gb win10 pro partition on it. This is a 2015 rMB 12" base will probably stay put since ill be using 13" late 2013 rMBP more and adjust as needed, maybe transfer key documents and files from the sierra partition and go all el cap, or favorable capacity towards it (176gb) and a 40gb sierra test partition to see if its improved before leaping again and 13" i have 80gb el cap and the rest sierra, may change it to other way around or all el cap too and just try the test partition on 12" as assurance WHY? i don't like that scrolling is choppy, it degrades the experience and feeling of buttery smoothness. it also seems to beach ball more often and slower in general, and possibly worse battery life, this is 10.11.6 vs 10.12.1, feels a lot more mature and polished plus i like latest and greatest but you lose watch unlock (cool on my 12"), messages app, and Siri (don't use on pc, much less on phone) to go to el cap, thats not giving up too much!