Originally Posted By: hybrid8
Shouldn't be country specific. I'm linking to the plain page without any country sub-directory. The link is this: http://support.apple.com/kb/HT3561

Still only shows the 1.4 iMac update.

Quote:
About the iMac EFI Firmware 1.4 Update

* Last Modified: May 05, 2009
* Article: HT3561

Summary

This update addresses issues where iMac computers with ATI Radeon HD 4850 graphics intermittently stop responding and addresses wake-from-sleep issues in Boot Camp.
Products Affected

iMac (24-inch, Early 2009), iMac (20-inch, Early 2009)

No clue whats going on there. I'm getting the generic/US page because it has the 1-800 number at the bottom.

Originally Posted By: hybrid8
BTW, Apple don't specify what version of SATA drives are in their machines.

Ahh okay. That is why they say it isn't supported.

Originally Posted By: hybrid8
Anyway, when has a computer manufacturer ever claimed to support any hard drive that they don't themselves ship or include in a published compatibility list?

In the bad old days of IDE you would need a compatibility list but nothing really recent has needed that. Well... except some issues with buggy SATA controllers and buggy SATA drives when used together.