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Numbers eats 70% CPU when mouse hovers over document

This happens only on my new MacBook Air 11" and only since I upgraded to Mountain Lion.


Whenever my mouse pointer is over a Numbers document (not the window title, but the actual document), CPU usage by Numbers.app goes to 70% and stays there until I move my mouse somewhere else.


Did anyone else experience this?

Posted on Aug 2, 2012 4:05 PM

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132 replies

Oct 25, 2012 10:01 AM in response to Jackrussell dog

You had Macs, well, I had PCs and still have!! You should really try to know Mac OS in a more advanced manner and with a more open mind and mature head. Instead of feeding yourself with whoever's opinion on the Web about things. Not saying that they aren't true (eg, most PCs are cheaper and more powerful yes) but the selling point of Macs is not so much the hardware but the OS itself and the whole Apple ecosystem. I am surprised you don't see this simple fact!


Not coming here anymore? Amen to that, Jackrussel Dog!! Also, I was going to say, ".. and stay out!!" (just kidding)... but in seriousness, please understand that should you require a forum like this to discuss Mac issues or any questions whatsoever, you are very much more than welcome. Even for a chat 🙂. But please don't be nasty here and narrow-minded.

Oct 25, 2012 11:16 AM in response to maiksd

You are right. It is only a westing my time with things, which are not the very importantn in my life. Apple also have to take their responsibility and make better products, AND fast reaction on negative responses. This stupid Number heater is more then 3 months old.

I don't know what Apple thinks but I am sure when they are going on with this problem in the next month, it will be my laqst Mac.

Nov 18, 2012 5:36 AM in response to Steve Jabs

There isn't any changes... The performance of processor is around 85% when the mouse hovers over cells. I think you looked user % what is different from processor %...


So, the phenomeon is still cause problem. I used a retina MBP, it is very irritating when your mac would like takes off from the table with fans because the mouse is standing over the cells while the battery time decrease sharply.

Numbers eats 70% CPU when mouse hovers over document

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