Depending on what type of CD/DVD you intend to burn, you may not need any 3rd party applications:
- To burn data CDs or DVDs simply insert a blank disc, drag files to the empty FInder window that represents the disc, then click the burn button (I think t appears near the top of the finder window).
- To burn music CDs just use iTunes
- To create disk images from a CD or DVD use Disk Utility. To burn .iso or .cdr images to disc use Disk Utility.
About the only type of disc burning that you may need a 3rd party application for is to create a DVD movie (iDVD used to do this but no longer a supported app). I haven't ever needed anything outside of the built-in capabilities of OS X when it comes to burnig CD or DVD media. One suggestion is to make sure to remove all of the Roxio software so that it doesn't interfere with the built-in OS X capabilities.
Hope this heps.