This means the system can still regulate the speed if it got too hot as that would be a max speed. So why SMC? It only allows you to set minimum fan speeds. There is some debate in the Apple world about the need to alter fan speeds, but I personally have found this little gem to be a savour to keep the iMac under control in terms of temps, and prolong the life of its components. The second app is called 'SMC Fan Control' which is a popular fan speed modifier for apple systems. See post attachements for a picture of Temperature Gauge. You can have warnings posted when it reaches a certain temp and it will auto start in the background (no dock icon, just a menu bar icon) upon logon. Fan revs are also visible with health indicator bars (green, yellow, red). The app will also show a nice visual display of the temps with a marker showing the maximum it achieved. It shows temperatures for CPU cores, GPU, optical drives, LCD monitor and Hard Drives. Having been a Windows PC user, I was not used to this and was later told that imacs do get hot as they disperse heat via its aluminum casing. I started looking for such an app when my iMac was extremely hot to touch. It is available from the App Store for a small fee of £2.99GBP / $4.68USD. The first app is called 'Temperature Gauge' by Tunabelly Software. I have only been a MAC user since June 2012, having replaced my Windows Desktop with a mid-2011 27" iMac. There are two apps that I highly recommend for iMac and MacBookPro users.
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