I tried to use Software Update and got this error message: An error occurred
The operation couldn’t be completed. (NSURLErrorDomain error -3001.)(102)--
Same problem here with iPhoto, Aperture and Safari Update, though other updates I needed were OK. Have tried usual things like rebooting Mac and Airport Extreme & Modem.
Fortunately both Aperture and iPhoto can be downloaded outside the App Store from the following:
I have not found a Safari download link yet though.