Since upgrading to MacOS a/k/a OS/X 10.12, I've noticed an annoying behavior. I have several spaces open. If I use [CMD][TAB] to move to EMACS from another program, the display switches to EMACS, it becomes visible, but then is immediately sent to the back and another application comes up. If I [CMD][TAB] again, it brings EMACS to the front.
I have no idea if this is an EMACS issue or a MacOX issue, but it's annoying and I'd appreciate any suggestions to make it stop.
GNU Emacs 25.1.1 (x86_64-apple-darwin15.6.0, Carbon Version 157 AppKit 1404.47) of 2016-09-08
System Version: macOS 10.12.1 (16B2555)