2018.4.8f1 editor high CPU usage macOS

When Unity editor is in the foreground, without pressing Play, only in editor mode, the CPU goes up to 30% usage.
With what even increases more when you press Play in the editor for the game's own consumption.

The problem can be easily reproduced, creating an empty project, and viewing the process list while unity editor is in the foreground.

How can I fix this?
Thanks

 

it happens in a new project.
I used the profiler in editor mode, but the CPU usages goes to 230% and is difficult to know what is causing it.

I see those peaks in the cpu continuously.

 

It happens too with Unity 2018.4.7f1, using Editor Metal API does not resolve the issue.
I found this thread on the Unity subreddit, I'm not sure how long this is happening, it seems from Unity 2018.2.f2:
https://www.reddit.com/r/Unity3D/comments/90hpjy/latest_unity_high_cpu_when_idle_mac_os/

I attach a screenshot of the profiler in one of the CPU spikes in a new empty project:

 

@karl_jones any news about the bug? Thanks.
I have already sent a bug report.

 

I just reported it. Case number: 1183039
Thanks.

 

Just to confirm seeing this also. When in foreground, unity usage jumps up to about 80% on my machine, while doing nothing in the editor.

 

@karl_jones In my case I'm seeing heavy memory allocations every frame, with a large CPU tick on garbage collection.

 

Yes we've tracked it to google's PlayServicesResolver. So apologies unrelated to the issue herein, but still of note to others running google plugin (it's doing this even if in iOS mode)