(Sorry about the strange translations... It's what the forum provided)
Will my interlocutors open it with Acrobat Reader?
- That's up to them. It's certainly the best option.
Will it be the same for those who use a Mac and others on PC (Windows)?
- If they use Adobe Reader, then yes.
Do I need to attach the Acrobat Reader app (Mac and/or PC) for those who haven't installed it on their computer?
- NO! You can provide a link to the installer from Adobe's website, but you may not distribute it yourself without a license. It's also a bad habit to give your users, as they could very easily get a virus (not from you, but from others) by installing a known application from an unknown source.