At first, I typed " top -u" in terminal, then downloaded Camino.dmg and then double-click.
After that, I noticed Coreservice consumed 80 to 90% CPU usage. And it kept doing and prevented mounting.
Why coreservice is busy when I mount an image disk?
I "sudo kill" coreservice. It worked, after I killed it, image disk was immediately mounted.
I tried other dmg files. Almost were fine except OmniWeb.
Since I installed Safari v80, the system keeps Camino and OmniWeb from OS X???