5 Replies Latest reply: Apr 25, 2013 6:36 AM by Bimmer 7 Series
grandmerequilter Level 1 Level 1 (0 points)

Please tell me how I can reinstall Lion on my mid-2012 Macbook Air.  Following an install of ML 10.8.3, my battery life reduced from 7+ hours to barely 2. 


I am not a technie person so please, tell me WHAT to do and HOW (step by step) to do it. 


I am so sorry I installed the upgrade.  Machine had been performing very well. 


Thank you in advance for your help.

MacBook Air, OS X Mountain Lion (10.8.3), Battery life reduced by 2/3