100+ “Class implemented in both MapKit and VectorKit” warnings with Xcode 9.0.1 and above

Question

While running my project (which doesn\'t even use MapKit), my console gets spammed with more than a hundred class duplicate warnings:

objc[63

Answer 1

My case is a bit different: I met this issue while running XCUITest. After launching the XCUITest process, the target app crashes upon launch. However, after I removed all the Web proxies, this issue is fixed!