My MacBook Pro is running hot with fans on high since upgrading to OS X 10.9. Checking out Activity Monitor shows that symdaemon is using 90-120% CPU constantly. I've used LiveUpdate and made sure that I have the latest versions of everything in NIS.
If I use Activity Monitor to quit symdaemon all is well for a little while, then symdaemon starts again. At first it uses 20-30% CPU but eventually climbs back to 90%+.
I have found a partial solution. It seems that disabling "Idle-Time Scan" prevents this from happening. Come to think of it since upgrading to OS X 10.9 I've never gotten the message that the scan completed.
Running the same OS and NIS version on my wife's iMac seems to have no problems. The only difference I can think of is that I have a BC partition and a second internal hard drive in my MacBook Pro. I have Virus Protection setting set to not scan my Windows 8 partition, I don't see any way to configure Idle-Scan to ignore the Windows 8 partition.
Is there a fix?