youncester wrote:
The wifi, and audio worked perfectly normal when I did a clean install to SL. It also works fine when I boot to my old hard drive. I used wifi (while on SL) to download Yosemite from the app market, and how can I screw up going to the app market and downloading Yosemite directly from my MP? I get I messed up trying to clone the drive from my MBP, but there is not much you can mess up downloading the update directly from the App store. Also, there is no third party hardware. Thank you for your help on this....
I agree, downloading via the store should just work, I was unsure if you used other tools or just the standard 'download & run' install from the App store.
If you went via a tool like diskmakerx.com to create a USB installer it could cause issues, but I'd expect others to have reported that.
Apples own createinstallermedia should work well (& has done so in my experience).
Create a bootable installer for OS X Mavericks or Yosemite - Apple Support
I'd contemplate a full clean install of 10.10 instead of starting from 10.6, but it is probably getting to the point where you are bored of this & want help from the store or Apple 🙂. Use Disk Utility in the installer to wipe the boot partition before installing.
Don't forget all the regular 'resets' that may alter how an Mac behaves…
Resetting the System Management Controller (SMC) on your Mac - Apple Support
How to Reset NVRAM on your Mac - Apple Support
OS X: What is Safe Boot, Safe Mode? - Apple Support (a side effect of this is that kernel caches will be rebuilt)
https://support.apple.com/kb/PH14201 Incompatible login items - probably not an issue here but worth disabling the login items as a test.
See if they have an effect before you start over… sorry it's unclear to me what is happening here.