Since upgrading to Mavericks, I can't connect to my external Seagate hard drive. How to I fix this??????

Seagate and Western Digital are both not getting along with Mavericks. The problem is generally associated with installing software supplied by the external's manufacturer which is incompatible with Mavericks. If you have installed Seagate software, I'd suggest uninstalling it and seeing if that fixes the problem. You might also check Seagate's support website to see if they're now offering Mavericks compatible software.

So the drives are Seagate Barracudas but in enclosures that aren't from Seagate? How big are they, and what was your OS before you upgraded to Mavericks? Is the SATA to USB adapter something like this?

I tried to connect a Samsung hard drive. Before Mavericks it was working fine. Now it won't appear in Finder and it can't be mounted in Disk Utility. As with previous issues I reported concerning iOS 7 and Mavericks, I wrote in this forum, but Apple never reacts. People are trying to help each other with workarounds, which is great, but the core issue isn't solved by Apple. It seems after Steve Jobs they're not concerned about quality that much anymore. The fact that I can't use a very common Samsung external hard drive on Mavericks is just way beyond deplorable. And what did I get in return? iBooks?

Hi,

I have the same issue, have you been able to solve the problem?

Thx,

You need extra software for it, like Tuxera to mount the disk.

Thanks, this solved the issue.

In fact I had to reinstall Tuxera. It looks like the Maverick upgrade created a conflict, but now after a reinstall it works well again.