Although we don't support running the XM Radio Online player on older versions of Mac OS X, we have had reports of success by installing Windows Media Player 9 for Mac OS X. Click here for more information about this FREE download.

The new sirius player would not play on my mac.I am using mac os version 10.8 mountain lion. Adobe flash player version 11.4.402.259 (the newest). Moving pictures desing software for mac.

Get that player from down loading it from adobe.com. My mac is a 2010 2.4GHz Intel Core i5. 4GB 1067 MHz DDR3 memory. So, go to 'System Preferences'.

In the 'Other' section choose the flash player and set 'Allow sites to save information on this computer' or set to 'ask me before allowing new sites to save information on this computer'. You should be able to log in and play your Sirius XM internet player. This worked for me.