Unlike previous security updates that have supported Leopard and even Tiger, Apple's latest update requires OS X 10.6 and OS X 10.7, and this means that users running OS X 10.5 will not be able to update their systems.
Hi John, Thank you for your expertise and, more important, for your kindness because they make me, almost, look forward to my next computer problem.
After the next problem comes, I'll be delighted to correspond again with you. But system administration has never been one of my talents.
Nowadays, it seems only that disk is available from Apple, and it doesn't really specify Leopard as a requirement.
I don't see a "full install" disk any more (and to be honest I'm not sure I want to pay that price either.) Did Apple change this requirement because they don't care as much about older versions any longer, or is it still there, but undocumented?
This requirement for having at least Snow Leopard means that any Mac user running a Power PC system, be it a G4 or a G5, will not be able to run the latest security update.
Apple stopped supplying OS updates for Power PC-based systems with the OS X 10.5.8 update, but this is the first time that Apple has no longer supported them with security fixes.
Most of the time security problems lie in the programming of specific services on the system, so unless you can manually alter a setting or two to perform the same actions as the security update, then the only option is to limit the use of the affected services on your system.
This means that if a problem is found in the future for a system service such as File Sharing, then the only way for older systems to avoid the problem is to disable the service.
While it is difficult to recommend that security updates are not necessary, in many situations they address proof-of-principle vulnerabilities more than those that are active security problems that are even remotely used to hack into systems.
As a result, in addition to considering how exposed your system might be to a vulnerability, chances are that you will be OK as long as you access files and Web sites that you trust.
"The reasoning is that these folks never paid the 9 back in 2007 to upgrade to Leopard.