Recommendation for External DVD Burner

I have a late 2009 iMac running OS Yosemite. I purchased an LG Slim burner #GP60NS50 SL R which the manufacturer claimed was compatible but wasn't. It appears that the compatibility (from looking on the web) is inconsistent depending upon which OS is used. Can anyone recommend a good burner that will work with Yosemite? I assume that the Apple model would work but it is a lot more expensive than others. Thanks.