Over the last two and a half hours I’ve patiently sat installing Mac OSX 10.5 Leopard (it’s very nice, but more about that later). During the installation I was asked whether I wanted to format my drive as case-sensitive or case-insensitive. Because I play around with code a fair bit, I plumped for the former. Everything worked fine until I tried to install Photoshop CS3 Extended Edition, at which point I was greeted with the following message:That’s right, Photoshop CS3 will not install on case-sensitive systems. A quick Google reveals that quite a few people have run into this problem. There are ways around it, but they’re a bit convoluted, and the various authors do all seem to admit that they haven’t tried every feature. One solution even involves dealing with a message prompt every time you open CS3. To be fair, Adobe have acknowledged the issue, [article no longer on the Adobe website] but they’ve also said that “lacking a case for the user benefit provided by case sensitivity” they don’t intend to do anything about it any time soon. So it looks like I’m re-installing Leopard this evening; today’s lesson is that if you’re going to run Photoshop CS3 on a Mac, please please please don’t choose a case-sensitive format for your hard drive.