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Hi i recently upgraded to a MacOs 10.13.6(High sierra) with a 4gb ram core i5, yeah its a early 2011 macbookPro. i also upgraded from Xcode 7.3.1 to Xcode 9.2 so i could use swift 4 since then , i have never been able to run an app , because the IOS simulator is really slow and basically unusable , it takes so much time to boot up and most times it never boots it just gets stuck with the apple logo and all and then sometimes i get these weird errors like . (DTServiceHubClient failed to bless service hub for simulator iPhone 8 Plus (B3397E0A-C903-4AE1-BE2A-485980D4B3B2)). I am really fustrated and i have looked all over the internet. I know this question has probably been solved but please cut me some slack i'm a newbie and i really don't know whats going on.Thanks