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Just to make it clear, if your imac is the Aug 07- Feb 08 model, it CAN have tiger, if its the Feb 08+ (penryn) model, it can't.
 
Soooooo, if that is true. Why would the exact same application work on Tiger, but not on Leopard?

Because the operating system has changed and the vendor of the application needs to update it in order to work with the new OS. The vast majority of applications written for Tiger work fine in Leopard, some do not and the ones you have listed are ones which are known to misbehave in Leopard. Upgrade the application.
 
fwiw, I've been running Leopard 10.5.2 on my new Penryn Macbook Pro and have had several OS-related issues that seem to not be caused by apps.

eg: After display sleep, sometimes the Finder Desktop UI is disabled, meaning no mouse/keyboard-based desktop events are processed. I need to restart the Finder manually to regain access to the desktop.

I'm hoping 10.5.3 (due soon) will fix these issues. Only time will tell.
 
...Leopard is a major leap forward in terms of it's core elements compared to Tiger. I expected much less number of apps that didn't need to patched in order to work correctly with Leopard. :)

Besides, its just a simple patch! Apps didn't have to be completely re-coded, like during OS9 -> OS X transition.
But it's not "just a simple patch". If it was, I am more then capable of fixing them. Instead I have spent hours on the phone with Apple support as they try every trick in the book to get things to work (and no, they didn't install any "patches"). Also, everything I listed is not "just app related".

I'm not going to spend several thousand dollars on new software just so I can work on Leopard. Every other Mac OS has been compatible with older versions of software, so why isn't Leopard? Oh, that's right because it's so "advanced" :rolleyes: ...

What sort of major leaps has Leopard made to it's core elements that Tiger does not have?
 
It seems to me that many have forgotten (or weren't around) for the 10.3.9 to 10.4 (Tiger) transition. There were many of the same complaints. You HAD to upgrade MANY applications, simply because 10.4 had some changes. It wasn't until 10.4.x (x>=5) where Tiger started to stabilize. While Leopard is slower for me on start-up, I would not give up Spaces or, especially, QuickLook.
 
Every other Mac OS has been compatible with older versions of software
...
What sort of major leaps has Leopard made to it's core elements that Tiger does not have?

What are you talking about? software incompatibilities occur with every OS upgrade. This is nothing new
And believe me there have been some big changes to the underlying OS in Leopard, just because they aren't on the surface doesn't mean they're not there.
 
I dunno. I bought a new iMac with Leopard. I run Stuffit Expander (12.0.1) and Photoshop (CS3) all the time. Neither has ever crashed. I don't think this is an issue with Leopard.
 
if i may make a suggestion, pay the $29 and get the OS X 10.6 snowleopard upgrade when it comes out this fall
 
Ah ha, so it's everyone/anyone else, except Leopard? It's just me, it's the applications, it's the dust bunnies under my desk. Nope. Sorry, I'm not buying it. I'm not a dimwit....Wait, I'm going to give one more chance at redemption here:

All application work perfectly on Tiger (running them right now on my Macbook because I can't deal with the Leopard BS anymore today). These same applications crash, crap out, pull weird ***** and just plain don't work when run on Leopard. So it's whos fault again? The applications? Oh. So, Leopard is so far "advanced" that it can't run applications that it's most recent sister (Tiger) could run and all of the applications in the world just cant be bothered by the power of "El Leopard"!!!!! Come on now.

Yes, I do expect to turn on my computer and the application should just run. That's how I was brought up. My mom had the very 1st Mac and I have been Macintoshed since then (so 24 years until a bomb [leopard]). If I wanted to fight my computer to do what I asked it to do, I would buy an IBM. ;)



The reason why you are having app trouble with Leopard is that Apple made a bunch of under the hood improvements and dropped a bunch of obsolete legacy code that they have been supporting for over 10 years.

The apps you are having trouble either use that legacy code or run afoul of one of the under the hood changes.

Blame the application creators for being lazy because Apple gave them over a year to port over there old code AND they even made it easy for them to do it.
 
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