How to download music from my iPhone or Mac?

I don't want to pay for songs, is there an app or some sites where I can download music for free form my computer or iphone?
Please don't say any app because I don't want to use apps to listen to music.

You can use this website to download the songs straight from YouTube:
http://www.youtube-mp3.org/
Then plug your phone in, move the songs you downloaded into your phone, and sync it in iTunes. And there you go.

I'm pretty sure for your MacBook you can search the song on YouTube and copy the link to a YouTube to MP3 site. Copy and paste the link and then it should download and go into iTunes automatically. I personally buy my songs from iTunes, but I know someone who does it the other way. So hopefully this helps

Try the torrents.

Grooveshark is good. Use firefox with downloadhelper or netvideohunter extension.

http://grooveshark.com/#!/