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OS X Lion Overheating: MacBook Pro and iMac

It has now been just over a week since Apple released OS X Lion, and in that time we have shared with you a few problems that Mac users have been experiencing. These include an external display bug and videos crashing in YouTube. We have since learned that there is an overheating issue with the MacBook Pro who has installed this latest update.

Questions have been asked if the Pro is ready for Lion, as this is not an isolated incident. Having looked on Apple Discussions we can see that a number of MBP owners are now noticing how hot their laptops are getting, with some saying that they get so hot that you could fry an egg on it. You may think that this is a joke, but a few searches on YouTube will prove that this can actually happen.

In most cases the reason for the overheating is an issue with the fan, as it does not power up, and if it does it just stays on far too long. In either case the laptop will still be too hot to place on your lap and will also slow down. Those affected will notice that when they go to open programs or WebPages it all happens a bit too slow.

There are said to be two solutions to this, but there are mixed success rates for this. The first is to deactivate FileVault, as it is set to active by default. The other solution is to disable Spotlight indexing; the way to do this is by opening up the Terminal and pasting in sudo mdutil -a -i off. You are warned that doing this could lead to data loss, so it is up to you if you wish to chance it or not.

Do not worry about losing Spotlight, as there are a number of apps on the Mac App Store to do the job, just until Apple is able to come up with a fix. Other problems reported are slow startup and shutdown times. We cannot say for certain if this is true or not, but our MacBook Air has suffered from this issue.

Having said that, not all are having such issue with OS X Lion, as there are some cases where Macs and iMacs have been running much cooler. We have yet to keep our MBA on long enough to test this, but our iMac runs like a dream.

Have you noticed that your Mac is overheating since the Lion upgrade, and has turning off Spotlight helped at all?

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