Since I updated to 10.11.3 (a few days ago) my Air crashes about once a day. It used to be once in a while and in the past months about once in a week.<p>iTunes give we some weird null error if I switch accounts. Since a few weeks I think (do not use it often, only for updates).<p>My iphone 6 often refuses to show the &#x27;copy&#x27;-popup the first time I select something. So I regularly have to selected something again, just to get the popup. This used to work the first time.<p>Just some examples that come to mind.