Hi Adam I didn’t experience your errors BUT when I upgraded to 10.13.4 last night I got a notification from the App Store that there is another update to 10.14.5! I can only assume that another update means that something isn’t working as well as Apple wants. As my iPhone 6S updated its OS without my asking it to (I always leave at least a week before updating). Thus the control of updating IS being wrested away from us users and firmly in the court of Apple’s patrician (I don’t include our distaff as I’m a gentleman:) propeller-heads; this is borne out by a news item (that I haven’t verified yet) that Apple is disabling iPhones which have had their screen repaired by a third party! They DON’T want us messing around with “their” shiny technology:((