erpetao

macrumors regular
Original poster
Jun 19, 2011
212
89
I've been wary of doing a clean ML installation, but in the last couple of days my 2011 Air would not wake up from sleep a couple of times (having to hold the power button to reboot), and I had enough: time to do a clean install.

Considering you are already backed up with Time Machine, the process is fairly simple: press CMD+R while your system is booting, use the disk manager to erase your drive, and then choose the internet installation.

Now I have a clean system without all the stuff that I've been collecting through all these months and that may have been affecting battery life (growl, serviio, third party drivers for stuff I don't use anymore, etc.). And a clean OS installation.

So far the issues that seem to be fixed with my shiny new OS:

- Immediate wake up from sleep (before it would take around 5s)
- Improved battery life (now I get around 6h to 7h estimated battery life where before I would get around 4h).
- Random freezes crashes gone.
- Non waking up from sleep gone.
- Improved free space (before I got around 20GB free and now I have 40GB, although this is also because with a new install you can skip reinstalling stuff you don't use anymore).
- Improved responsiveness, the system feels "snappier" in general.
- Safari also feels snappier while browsing.

So guys, my advice is that if you have some of those common issues and you upgraded to ML from Lion, give a clean install a go. ;)
 

Mrbobb

macrumors 601
Aug 27, 2012
4,992
196
Whoever posted that he's used the same machine since 2002 without a clean re-install, I say, count ur blessings.
 
Comment

Birone

macrumors newbie
Jul 19, 2012
28
0
I've been wary of doing a clean ML installation, but in the last couple of days my 2011 Air would not wake up from sleep a couple of times (having to hold the power button to reboot), and I had enough: time to do a clean install.

Considering you are already backed up with Time Machine, the process is fairly simple: press CMD+R while your system is booting, use the disk manager to erase your drive, and then choose the internet installation.

Now I have a clean system without all the stuff that I've been collecting through all these months and that may have been affecting battery life (growl, serviio, third party drivers for stuff I don't use anymore, etc.). And a clean OS installation.

So far the issues that seem to be fixed with my shiny new OS:

- Immediate wake up from sleep (before it would take around 5s)
- Improved battery life (now I get around 6h to 7h estimated battery life where before I would get around 4h).
- Random freezes crashes gone.
- Non waking up from sleep gone.
- Improved free space (before I got around 20GB free and now I have 40GB, although this is also because with a new install you can skip reinstalling stuff you don't use anymore).
- Improved responsiveness, the system feels "snappier" in general.
- Safari also feels snappier while browsing.

So guys, my advice is that if you have some of those common issues and you upgraded to ML from Lion, give a clean install a go. ;)

Did you restore from time machine or just select the files you wanted back from its folders?
 
Comment

throAU

macrumors 604
Feb 13, 2012
7,058
4,827
Perth, Western Australia
I highly suspect that the likelyhood of having problems with upgrades depends on how much third party software you have installed.

I keep my machines relatively clean (due to being burned by third party software in the past on Windows) and have yet to have an upgrade issue on 3 machines since Leopard.
 
Comment

erpetao

macrumors regular
Original poster
Jun 19, 2011
212
89
Did you restore from time machine or just select the files you wanted back from its folders?

I didn't restore from time machine. I just copied over my documents, aperture library, and itunes library. I also took the opportunity to upgrade certain software (like vmware fusion 4.x to 5.x which is supposed to work better with ML).

And I didn't install any of the applications that I wasn't using anymore which meant I freed up a lot of space.
 
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