How to use a different language keyboard without having to change the language on the OS

I don't do this a lot, but you might try adding a new input source in the Keyboard system preferences. You an check the box to show it in the Status Menu area. There is a shortcut to switch between input sources.

DantnadOriginal wrote:

how can I use each keyboard with their respective layout?

The only way normally to do this is to switch your input source to US or ABC when you are using the external keyboard. This can be done via the "flag" menu at the top right of the screen or via a keyboard shortcut (after adding US or ABC to your list in system prefs/keyboard/input sources). For it to happen automatically you would have to add some 3rd party utility. Karabiner might handle it.

Hi DantnadOriginal, glad to know it worked.

The easiest way to install this "extra" type of software is indeed with binaries like you did. Assuming that are available – you were lucky, in fact, to have the binaries available ready to use.

Binaries are like apps: ready to execute programs. The compilation is already done by someone else.

It's not always that easy. Homebrew is a tool that helps users to install and manage software otherwise not available for Mac. Actually it exists to facilitate the installation of this type of programs without the need to compile them manually.

Probably when you went the Homebrew way something was missing (the very brew command or something else).

Look if this project is useful: https://github.com/jeantil/autokbisw