Should be no problem using your MAC:
Go to YouTube and search for the song you want like:
“Conga karaoke”
I found this video and it says it is in the of KEY is “E”
https://www.youtube.com/watch?v=NtMn49ASDS4Copy the above URL and paste it into this site:
https://mp3-convert.org/youtube-to-mp3/Hit the BLUE “Convert” button and in a minute or so, click on the BLUE “Download” button that will appear.
Go to your DOWNLOAD folder on your MAC and find the Conga.MP3, you just downloaded.
Copy and Paste the “Conga.MP3” file onto a USB stick and place that USB stick into your Tyros 4 Keyboard.
You can then open the Conga.MP3 file in your keyboard’s WAV player and play along with the song.