If you’re a Mac RefWorks user, and are thinking of upgrading to Apple’s new Mavericks version of the X operating system, you should be aware that Write-n-Cite is not compatible with OS X10.9.
According to the RefWorks Facebook page, currently, Write-n-Cite only works with OS X up to 10.6.
Without Write-n-Cite functioning you can still format a bibliography using the One Line/ Cite method.
Update: see this post for a possible fix.