Mac OS versions compatible with partypoker software?

So, I am trying to install the partypoker software in an old Mac, I used to be able to play on it, but now it seems impossible. My computer is a:

Mac OS Sierra, version 10.2.6.

At partypoker.com they say that those are the requirements, I think this mac fulfill them all.

System requirements​

• Intel based Mac, macOS / OS X – El Capitan / Yosemite / Mavericks / Mountain Lion / Lion / Snow Leopard, Safari 5+ recommended
• Minimum 512 MB RAM
• Screen resolution of at least 800 x 600 pixels with a minimum of 256 colours

source: https://www.partypoker.com/en/poker/download

Can anyone help me find the version which is compatible with my system?

Thank you,

Topcat.