To repro:
1. Open Unity - Project.
2. Wait for several minutes.

Actual result:
Unity crashed after several minutes of work with staketrace:

Thread 0 Crashed:: CrBrowserMain Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x00007fffd753edda __pthread_kill + 10
1 libsystem_pthread.dylib 0x00007fffd762a787 pthread_kill + 90
2 libsystem_c.dylib 0x00007fffd74a4420 abort + 129
3 com.unity3d.UnityEditor5.x 0x000000010240a1e1 HandleSignal(int, __siginfo*, void*) + 81
4 libmono.0.dylib 0x000000010af49b2a mono_chain_signal + 75
5 libmono.0.dylib 0x000000010ae91bd6 mono_sigsegv_signal_handler + 210
6 libsystem_platform.dylib 0x00007fffd761dbba _sigtramp + 26
7 ??? 0x00007fffdcc24c30 0 + 140736897109040
8 com.unity3d.UnityEditor5.x 0x0000000101206d0c EditorMetricManager::UpdateProjectSnapshot(EditorMetricProjectSnapshot&) + 140
9 com.unity3d.UnityEditor5.x 0x0000000101206c41 EditorMetricManager::ProjectSnapshotTick() + 113
10 com.unity3d.UnityEditor5.x 0x000000010120787a EditorMetricManager::Tick() + 106
11 com.unity3d.UnityEditor5.x 0x00000001027ab074 Application::TickTimer() + 1508
12 com.apple.Foundation 0x00007fffc3dc35df __NSFireTimer + 83
13 com.apple.CoreFoundation 0x00007fffc234ed74 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 20
14 com.apple.CoreFoundation 0x00007fffc234e9ff __CFRunLoopDoTimer + 1071
15 com.apple.CoreFoundation 0x00007fffc234e55a __CFRunLoopDoTimers + 298
16 com.apple.CoreFoundation 0x00007fffc2345f81 __CFRunLoopRun + 2065
17 com.apple.CoreFoundation 0x00007fffc2345514 CFRunLoopRunSpecific + 420

Looks like a regression since 5.5.