@romain be careful which Emacs release you use, not all are equal. When I had to use a Mac at work, I install Emacs from https://emacsformacosx.com/

That worked very well with Spacemacs

I moved back to emacs-plus and will not use tooltip at the moment. I never tried emacsformacosx, I don't know how it compares to emacs-plus

all I know is that emacsformacosx doesnt mess around with Emacs libraries, it just gives you the standard Emacs release. Its a pretty safe approach. I havent use MacOSX for several years now, so I am not aware if there is anything better.

The Spacemacs docs for macosx are here https://github.com/syl20bnr/spacemacs#macos

Oh it's cool, homebrew is using emacsformacosx when installed with cask

Will give it a try 😉

emacs-plus is basically GNU Emacs as is, it’s not a port, it adds small things like Spacemacs icon (you can opt out of it) and additional flags like --HEAD and --devel. OTOH emacsformacosx adds some patches that supposedly should make it work better in OSX, In my experience though I had a few cases where it would either die unexpectedly or would get really sluggish.