Would anyone advise against installing the supplemental update for the 2018 MacBook Pro? I have the i9 which so far is performing perfectly fine for my usage, but the thought that it could perform even better is very tempting. However I am seeing reports of people suffering issues (including KP), which they never had before installing the supplemental update/s. What I really want to know is, if I have a Time Machine backup, can I 100% undo this supplemental update? Has anyone done exactly that? Also can anyone confirm that supplemental update 2 also contains the first supplemental update from July, as both links are still available to download from Apple, which is confusing.