This is an Apiotek II 300 Express Adapter. I went out to Apiotek.com and it appears the domain is for sale. Is there any way to get a software update or do I have to buy a new Express Card that allows eSATA drives to work with Mavericks. I did a backup before I upgraded using X 10.7.5 and everything worked fine. The eSATA drive is not seen using Disk Utility either. Thanks for any help or suggestions.