I suspect that you have installed a demo version of CS4 and then uninstalled it? I think that there are traces on your system that are affecting the new installation and Adobe have a script on their site that will tidy it up for you. Try a search for it, if you are not successful, let me know and I'll have a look for it.
Exactly the same issue happened to me.
Chris
Don't want to sound of, but is it a hooky copy? Have had this problem before with copies. If it ain't then I'd suggest looking to uninstall any demos first. Do a search in finder for any photoshop files and ditch them manually if you can't uninstall.
I have never used any adobe softwares apart from Lightroom 2 before this. I have even uninstalled Lightroom now!! But no luck :bonk:
I have been trying to install CS4 but everytime I started, it stopped and kept saying ''This software cannot be installed because the file system of the OS volume is not supported. The OS Volume should be local, writable, and should have a non case-sensitive file system'' so literally its was never installed.
Okay - next question - where are you trying to install the software; onto the internal disk or an external drive? If external, it is directly attached (USB / FIREWIRE) or a network drive?
What is the format of the disk you are trying to install to?
It's the internal one and the format is Case-sensitive Journaled.
if it's any help ( probably not) but I've a MacBook Pro with 10.5.7 and running CS4 no problems. CS4 was installed under 10.5.5 but I don't think that should be a problem. Also CS4 initially installed via 30 day trial whilst awaiting Mac License, so it's possibly similar to you own set up
Try getting a copy of Appdelete. and get it uninstall all the Photoshop files. This should clean up any residual Photoshop fragments that may be around. I would then download another copy of CS4 and see if that loads.
Tried this to uninstall all the photoshop software, still not working :shake:
I have done a bit more looking on this one and it does appear to be an issue with the format of your drive.
Have you re-installed or altered your hard drive at all recently and changed the format to be case sensitive?
Do you have a separate drive that you can use to back up all your data so that you can reinstall and format the drive?
Yes Paul, I think its the format of the drive. I have not re-installed or altered my HD yet after I bought this in April. I think it's the first set up which went wrong, I dont know what I have done, cant even remember any options to go for case-sensitive or not. But my brother has the same configured Macbook which is not a case sensitive one (MAC OS EXTENDED JOURNALED) and I tried CS4 there, that was working. So I am planning to back up everything and re-format the HD now.
I dont have any other HDs to back up, so thinking of COPYING all the data (could be around 60GB) to my HP Laptop via network sharing!
Any other better ideas?
One more thing, can anyone remember when to select Case-sensitive or Journaled formation for Hard disk while re-installing?
Thanks everyone for your help. I'll probably re-format this HD tomorrow

so by that time any other better ideas?? I'll certainly appreciate that.
Thanks once again