Why is my iMac running so slow?
iMac 24" 2007 4g dram OS X 10.(latest version)...
Running slow... Beach ball spins forever! Permissions fixed...
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How full is the drive? Backup the drive with Time Machine to an external hard drive. Use your original system installation disk to startup from. Run Disk Utilities and re-format the drive using the "write zeros" option. This will take several hours to overnight. Now re-install the system and do a restoration from your Time Machine backup.
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