MacBook SMC Firmware Updater1.5

I have downloaded the .dmg from MU and directly from Apple's site 3 times now but each time I get this warning when opening the .dmg http://i.imgur.com/r1p5pZ8.png I have seen this with other DMGs before but it's not very confidence inspiring for a firmware update that could brick your computer if anything goes wrong. MacBook late 2008 running 10.8.2. Anyone else have this problem?

Need to load the EFI firmware first. Hope these two fix the unable to return from lid down sleep problems.

I installed SMC Firmware 1.1 on my 2 GHz MacBook, which was *not* exhibiting the sudden shutdown problem as far as I could tell, as is recommended by Apple. There have been no issues with the update.

How is it going to fix a hardware problem? They should replace the heat sink.

Finally! I didn't anticipate a software fix to the RSS (random shutdown syndrome) problem. Fingers crossed now!

now the sound from the fan finally ended, took it to get fixed to an apple store and they told me to wait for this update... great job apple!!! without this fix, i nearly couldnt even take the macbook to libraries as it made that horrible sound (the one that looked like the fan was gonna start but then didnt... I know most of the macbook users know what im talking about).... now we only need to improve bootcamp so that the mousepad works as in osx!!!

Updated my BlackBook today because this was in the 'auto update' section. My BlackBook purchased 1.5 months ago was already as quiet as a mouse, but i updated anyhow. Thus far...2-hours later of constant use, my BlackBook is still as quiet as a mouse. No new noises or fan spinning or anything. I have a feeling it will simply make my fan run more efficiently on an already quiet macbook.

Appears to have adjusted the maximum audio volume on my Macbook too.

Stopped the occasional mooing completely after 3-4 hours of continuous use. I don't notice any baseline increase in fan noise either. CPU temps appear unchanged on average (using the Hardware Monitor app) compared to the same time yesterday at home with same indoor temp. Nice fix, Apple.

Is this for MBP too? Mine has been quiet, so I remain hesistant, as its also not in the software update thingie. NP PS, whats SMC mean?

I read on another forum that a MacBook user, who did not have a mooing MB, applied this update, and then he noticed his fan on all the time. Now his silent MacBook is making noise, noise from the fan constantly spinning. Just a word of warning to those without the moo who like their MacBook as it is -- IF IT AIN'T BROKE, DON'T FIX IT! I do not think I am going to apply this update because I don't want my fan spinning all the time.

Very quick update process. Some noise and two restarts and it's all done. Too soon to be aware or confirm any beneficial or adverse effects. But no repeated "moos" by the fan after 5 minutes of use.