Apple unleashed updated iMac computers yesterday with new CPUs and SSD options. If you already got your hands on a 2010 iMac, Apple has an OS X update released you should apply right away.
The Mac OS X 10.6.4 Update iMac (Mid 2010) resolves compatibility and performance-related graphics issues, improves compatibility with large-format SDXC cards and adds support for the Magic Trackpad.
There are many other fixes that apply to other Apple Macs as well in the OS X 10.6.4 update, which was originally released on June 15th.
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