I'm planning on upgrading to Yosemite from Mavericks on a Mid-2010 MBP 15" with a Samsung 840 PRO drive as the primary drive. I have TRIM disabled! The process I want to use is as follows so I'm just looking for a validation please!
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Make sure Time Machine backup is current and good. I'll restore a single file to verify.
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Verify TRIM disabled via System Report. Shows "TRIM Support: No"
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Download installer from App Store and run upgrade in place.
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Once done, reboot.
If all is well:
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disable signed kernel extensions.
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Install TRIM Enabler
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Reboot
Should be done.
Are there any problems with this methodology that I should be aware of?
Is there a significant advantage to a clean install versus upgrade in place? I know there is for Windows, but I've upgraded this system twice now with no problems.
Thanks in advance for the advice.
Best Answer
I never do upgrades any more - I made this from several times from Snow Leopard to MountainLion and my MacBook Pro 15" Dec 2010 got sloppier and sloppier in performance. Instead, I would recommend the following procedure which gets you a real fast Yosemite installation with a fresh and clean system:
You will get a system exactly for your needs, without any old drivers/kext and you cleaned up in great detail. :)
My MBP Pro is now flying at high speed below radar... :)