First off installing through pacifist is NOT the way to go. that way may result in corrupt files, or simply missing components. It will also require you to enter your serial number every time you open up the program which would be a pain in the @$$. I wrote up a write up on reddit if you wanna read it and upvote it
or u can simply read it below.
http://www.reddit.com/r/apple/comments/r2z3f/final_cut_pro_7_on_a_g5_or_any_apple_computer/
Anybody ever want to install Final Cut Pro 7 but you system does not meet the required specs? I can solve that problem for you Maybe you still run a G5 or your macbook laptop doesn't have enough video ram Either way it is possible to install FCP7 A warning on the side of the video ram on laptops is that it could possibly overheat so its all at your own risk as far as G5s go, ppc was originally fully supported by the app regardless of what anyone will tell you. Tell them that they are free to believe whatever they want. Ok here is how you do it:
1. First you have to get your Final cut 7 install disc, and use Application>Disc Utility to make the files writable
2. next step is to right click on your install final cut studio file, and click show original
3. Then you must right click on the FinalCutStudio.mpkg file and click show package contents
4. click the contents folder right click on FinalCutStudio.dist and open it with textedit (you could also open in Xcode but most people don't have that)
5. use command F to find the first piece of code starting with "<installation" (obviously search the code without the brackets) it should say installation = blah blah blah Just delete that one line and then save the file
6. exit out of everything and go back to you original install final cut studio file
7. Open the file and it should install on a G5 fine
You could also use this to bypass ANY kind of system requirement check that it gives you an error for.
USE AT YOUR OWN RISK- also not all features may work have fun- Mitch The End