Use Swift 2.3 in Xcode
In project’s build settings, search for legacy swift
to find the correct build setting, then switch the setting to YES to opt-in to Swift 2.3 rather than Swift 3 in Xcode 8.
Disable OS ACTIVITY log
- From Xcode menu open: Product > Scheme > Edit Scheme
- On your Environment Variables set
OS_ACTIVITY_MODE
=disable