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Which version of MAC OSX you have ? (Click on Apple button -> About this MAC)
Is that an Intel MAC or Power PC ?
It is a Mac OS X, version 10.4011. Power PC G5
For Power PC MAC, you need to install Flash Player 10.1.102.64
1) Download the correct version from the Adobe Flash Player Archive list (http://fpdownload.macromedia.com/get/flashplayer/installers/archive/fp_10.1.102.64_and_9.0 .289.0_archive.zip)
2) Once download is complete, unzip the file.
3) Close all the browsers.
4) Under "10_1r102_64" folder, double click on "flashplayer10_1r102_64_ub_mac.dmg"
5) Install will launch and it will install Adobe Flash Player
I dont know what I am doing wrong, but it's not happening. I give up.