Thanks. It was some print manager thing. No idea why it suddenly started using 99.9% CPU.
While we're on the topic, is there any reason why Safari likes to occasionally start using about 50% CPU? It happens completely randomly as far as I can tell, and it just happened and I saw that kernal_task was also using about 50%. As soon as I closed Safari, kernal_task also calmed down. Is this an issue lots of people have that is triggered by something I'm doing? (I know embedded videos like to cause Safari to use a lot of CPU, though not this much, but this only happens when there aren't any embedded videos in any tabs I have open.)
You know, it may have started shortly after 10.5.1 for me, too. I only started paying attention to CPU usage after I had problems with my fans, and was told to keep an eye on what was causing them to spin too fast (and then break). So I've only noticed this problem for the past couple of months as well.I've been having that problem too. Noticed my MBP2.16C2D was running unusually hot and the fans starting up all too often. Sometimes at peak times SMBfancontrol app displayed 85°C and both fans at 6000RPM, it would go up and down couple times a day. Got me a little worried, since the computer had been completely silent for the most part of its life (unless playing games or running Aperture and Photoshop or the likes of those), its been going on for 2 months or so. I'd launch activity monitor to find Safari using upto 80% CPU. Once it was closed things cooled down quickly.
Never heard of this issue before now.. I was quite happy to see you mention it
Come to think of it this might have started after 10.5.1 update or soon there abouts.
Otherwise a completely smooth ride![]()