Running late 2012 iMac 27" w/ 24GB RAM and 1TB external Hynix SSD, I was having all sorts of fan problems, I thought it was because I was running Firefox with multiple tabs and iMovie and other apps at the same time, upgrading to Sonoma 14.5, it was breezing for a short while then the fan problems got worse and it got sluggish faster, then I discovered CGPDFService was eating up the computer usage percentage, and I found this article to fix the problem after I did this, I'm not having any fan problems nor sluggishness!
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