Improvements on MacOS installer and app

[HelioGuilherme66]

The MacOS installer was a good PR.
But there two things we need to do:

• Write instructions on how to edit /etc/paths, have that info (action item) in Run "missing RF" pop-up.
  The action item should open editor with root auth and try to get the PATH env and conciliate with /etc/paths content
• Make app icon not transparent, and have an action item somewhere to propose exchanging icon to dark or light mode.

[rbradhika530]

Hi HelioGuilherme66
Please suggest which version is compatible with python 3.9 on mac os because currently I am trying to install with
pip3 install -U https://github.com/robotframework/RIDE/archive/master.zip - this is giving beta version.
I want to install RIDE 1.7.4.2,
Please share instruction for this to execute on Mac Os.
Thanks

[HelioGuilherme66]

@rbradhika530 You have to use Python 2.7 or 3.6 or 3.7. See the README of this project.

[rbradhika530]

Ok, but I want to install python 3.9 with ride.
Please suggest specific version for this on mac.
@HelioGuilherme66

[HelioGuilherme66]

@rbradhika530 See the README, the current development version is the one working on Python 3.9.