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MacBook Pro slowed down wildly
- Thread starter Omnius
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Kernel
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Extreme lag, cursor lags, typing lags, everything takes forever to load. But after I first do fresh installs or reset pram and smc, it's fast and normal for about 2 minutes.
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Hd but as I said in the op, I've already ruled out the hard drive because I put a new one in.
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The problem apparently predates upgrading the ram to 8gb from the original built in 4gb a year ago.
Well then you don't know what you're missing without an SSD
http://1drv.ms/1mgZece
This is my 2011 MBP booting up in seconds (512GB Samsung 840 Pro) and going into an instantly-useable state after login.
This isn't a general gripe about age or slowly deteriorating performance. This a complete inability to do anything with any reasonable speed.Well then you don't know what you're missing without an SSD
http://1drv.ms/1mgZece
This is my 2011 MBP booting up in seconds (512GB Samsung 840 Pro) and going into an instantly-useable state after login.
Obviously something is amiss as 300% CPU usage for Kernel is the problem. Normally I would say a software issue, but given you have re-installed OSX on a new hard drive, I would say not. Did you try it with a truly clean install? Just OSX and nothing else. No peripherals plugged in, no other software, etc.
The next thing I would look into is the RAM. Swap positions with the RAM modules. Try them 1 at a time. Try the original Ram modules, also 1 at a time, etc. Good luck!
The next thing I would look into is the RAM. Swap positions with the RAM modules. Try them 1 at a time. Try the original Ram modules, also 1 at a time, etc. Good luck!
It's recognizing both ram chips. I've tried switching them and using just one at a time with indentical results.
After a new install it works at the proper speed for about 5-10 mins and bogs back down. It's the damnedest thing and it has me stumped. I'm comfortable working on anything short of work that involves soldering and I'm generally able to resolve software and hardware issues pretty easily.
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After a new install it works at the proper speed for about 5-10 mins and bogs back down. It's the damnedest thing and it has me stumped. I'm comfortable working on anything short of work that involves soldering and I'm generally able to resolve software and hardware issues pretty easily.
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I agree and I've done all of this with no success. I'm totally stumped because this basically indicates motherboard failure without symptoms that would indicate its motherboard failure.
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8gb of ram should be more than enough. The computer belongs to my boss (I'm somehow tasked with fixing it despite not being an it worker). He insists the problem predates the ram upgrade. Maybe I'll dig through my machines and find the same ram to test that too.
I have seen similar slow downs when using a bad hard drive cable. However, that is generally shown by constant beach balling. Does this happen under Snow Leopard, Lion, or Mountain Lion? Can you try doing an Internet Recovery to Lion or back to Snow Leopard?
Even though the drive is new, it could still be defective. If you have another drive you can test with, swap it out and see what happens.