I've got very similar problems with my Dec 2013 Mavericks rMBP 13" but pleanty of other complications. Let me explain how Chrome and the "Genieo" malware has corrupted the system, making Safari unusable.
First I had the problem common at that fall, requiring a logic board replacement (done in a few days in January '14). All was well. It performed like a champ again! No problems.
Then at the end of January, I acquired the "Genieo" malware problem. The only real help I got was from Thomas' site, themacsafe.com, especially on the hidden dangers of re-installing trojans for Geneio like "installmac" here
http://www.thesafemac.com/installmac-uninstaller-antics/
His recommendations involve disposing of certain bits of code that it had installed and avoiding the malicious "uninstaller" software - something I had already tried and failed with.
I went plenty of rounds following his recommendations. Genieo would take up ridiculous amounts processor and disk space; the fan ran all the time. It would get better with a restart, but only briefly. Then I tried uninstalling Chrome extensions and re-starting with different sets. In addition, Genieo malware got me to re-install Adobe Flash (through out of date" messages). Thus, I have two installed versions, like this:
Description: | Shockwave Flash 12.0 r0 |
and
Description: | Shockwave Flash 13.0 r0 |
After disabling the latter (selecting "Always"), things improved, but I got recurrent screen shudders or flickering at random times. Performance suffered again.
Next, I tried the old fashioned Mac OS cure, the "Safe-Start." This, again massively improved performance for a time. But them I was back to daily, then twice and three times daily system freezes just like before.
I tried to move my browsing activity to Safari. It worked for a brief time, then began crashing increasingly. Now it fails on launch - all the time. It is literally unusable. So for a month I've been living with daily system freezes and hard restarts using Chrome - typically two or three times a day (depending on length of use).
I've been putting off a complete system re-install. Meanwhile, in late April, it seems I have a new system update to perform. I suppose I will try that before doing the complete new OSX system re-install of Mavericks.
The point is that I've been living with an expensive, fairly new Mac machine that hugely underperforms and doesn't satisfy the user. I am bereft of any help apart from what I've discerned above from reading online BBs and peoples speculations.
I expect to go back to my default computer buying position before I upgraded from a 7 year-old MBP I bought 5 years ago (ie, late last year): NEVER buy a new Mac, always go with USED, older second-hand Macs (the previous year or older models), and avoid all of this B*** S***!
Some people - like me - are forever better off never being an early adopter. Let others deal with the headaches, delays, mysteries, and insolubles of any latest and greatest computer.
It's worth adding that besides an ancient router and an old MPB, I have no other Apple products in my home or workplace. And if I do in the future, they will be older and bought used.
Throughout the whole iPhone and iTunes mania and success of the past decade, I was something of an Apple dissenter in my buying habits. And now, once again, the Apple brand is deeply damaged for me. How unlike ten and twenty and even thirty years ago when I was a booster for the outsider genius of Steve Jobs, his vision and living legacies (when 'divorced' from Apple). This recent reversal of fortunes of Apple is all very sad to me.