Hi John Sounds like the iMac was getting hot and the fan kicked in, nothing to worry about.
If the fans were running abnormally high, you could try unplugging the iMac from the power for around 30secs (shut it down first!), this will reset the SMC. Regards Sam providing affordable Apple & PC services Sam Mullen 07747 778022 http://www.macambulance.co.uk [email protected] -- You received this message because you are subscribed to the Google Groups "Sussex Mac User Group" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/smug?hl=en-GB.
