Q: How to fix Mac OSX mountain lion battery life with 3 simple terminal commands!

Tried it. Multiple times. Made no difference.

Sorry, but I've done this, and I've seen no change.

SixtiethDegree wrote:

 

This does in fact work. This will not make your percentage raise, it will make your battery remaining time raise and make your battery percentage last longer.

The article was from two months ago and was tried at that time by folks here and it has not worked for anyone...except apparently you.

No effect on my Macbook Air late 2011. Battery draining as fast as before. Max 3h instead of 6 to 7 with Lion.

I need to add that I believe this is ruining my battery. Every day it seems to go faster and faster.

Laptop should not be tethered to wall all the time.

I have called Apple support twice (I have Applecare) and no help. They do not even acknowledge that there is a problem. "Mountain Lion is a more powerfull and faster operating system that it might use battery faster" - but I thought it helps to INCREASE battery life.

Observation from this morning:

9:20 I pulled the plug.

Now it's 9:59 and I have 77% left.

That's by no means normal even I do have USB 3G modem in use.

Before, even with 3G modem, I could get EASILY 5h if not 6.

It works for me.

I also really like the 'purge' command for freeing up memory (and potentially improving battery life indirectly). It's especially useful if you are a developer and running a local development server or a virtual instance of windows.

athal7 wrote:

 

I also really like the 'purge' command for freeing up memory (and potentially improving battery life indirectly). It's especially useful if you are a developer and running a local development server or a virtual instance of windows.

I used to use the purge command all of the time.  But something has clearly changed with ML...it no longer frees up all of the memory plus I get an odd error message.  I'll have to try it in a bit to see what it is.  But something's changed even with that...let alone the battery issue. 

Here we go...

Still works fine with Lion though.

Yea I get that same error, weirdly it still frees up memory for me. This Mac App seems to do the same thing (maybe more successfully) and without the warnings:

http://itunes.apple.com/us/app/freememory/id460931672?mt=12

Hopefully that helps

athal7 wrote:

 

Yea I get that same error, weirdly it still frees up memory for me. This Mac App seems to do the same thing (maybe more successfully) and without the warnings:

http://itunes.apple.com/us/app/freememory/id460931672?mt=12

 

Hopefully that helps

Thanks for that.  I think I'm going to wait to see how it behaves after 10.8.2.  I might give the app a try if nothing changes though.

Cheers!

I downloaded 10.8.2 today, and battery life now appears to be really bad. I didn't notice it that much with 10.8 or 10.8.1, but today I can barely get 4 hours out of my battery. It was at 52% and had 1 hour and 45 minutes remaining. I restarted the computer too. I don't use my computer for anything complicated, mainly just internet. And I always keept the screen brightness as low as possible. I hope the time remaining is wrong, but the battery percentage seems to be dropping fast now too.