Help! Lion has basically paralyzed my system. It takes 10 to 15 minutes to open a folder, to open Applications, Safari freezes and won't let me sign into the forums (I'm on a different computer). I tried to re-install Snow Leopard, but no go!

Basics - 2008 iMac, 2.8 Ghz, 4 Gig RAM, 500 Gig HDD with over 100 Gig free. DId Disk Utility verification and files-disk are fine. Programs will run, but any filing just stops everything (spinning beach ball). I've managed to back up some major content to an external HD, and hopefully, despite the inordinate amount of time it takes, I'll be able to off-load more. But how do I get Lion to work or, alternatively, other than completely erasing the HD, how do I re-install Snow Leopard?

Your upgrade must have failed.  Unless you very very recently upgraded Lion, as in the last hour or two.  Then you need to go to System Preferences and Energy Saver and stop it from automatically sleeping.  Let it sit overnight.  It could be spotlight re-indexing your disk and slowing you way way down. 
If that doesn't work then you can re-install Lion cleanly.  You need to finish backing up your data.  Then make a Lion USB flash boot disk or DVD.  Hold option key when you boot and select the USB or DVD drive.  Run Disk Utility and delete then recreate the partition, exit Disk Utility and install Lion.  Then restore your applications and data. 

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    N66

    Do you have another drive you can install SL on? If so, you can try installing SL on a 2nd drive, boot from that drive and use Migration Assistant to move your Apps and Data back from your Lion disk. I have not tried this, but see no reason why it should not work.

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    These places,
    MacBook Pro
    https://discussions.apple.com/community/notebooks/macbook_pro
    https://discussions.apple.com/community/mac_os?view=discussions 
    http://www.apple.com/support/macbookpro
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    http://manuals.info.apple.com/MANUALS/1000/MA1172/en_US/Snow_Leopard_Installatio n_Instructions.pdf
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  • I received and email from Apple Customer Support that my Id has been stolen and that I am to sign into the link provided and update by changing password. I am not certain that the email came from Apple.

    I received and email from Apple Customer Support that my Id has been stolen and that I am to sign into the link provided and update by changing password. I am not certain that the email came from Apple.

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  • Trying to re-install Snow Leopard over Lion and Macbook Pro is beeping like a memory failure

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    I it a general problem, affecting e.g. a Mac with multiple partitions.  I get the same with trying to mount 10.7 from 10.6.8.
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