OSX 10.5.8 - Which level of desktop?

[CathyG]

I have MAC OSX 10.5.8 and don't know what level of Parallels desktop is compatible. I tried the free download and it will not load with my os.

Appreciate and help with this..

 

[Parallels User]

If the trial doesn't run neither will the full version.
Parallels 8 requires 10.6.8 or later and an Intel Core 2 Duo or better, so no, it won't work on your OS.
Unless you have a very good reason to stay in 10.5.8 (which I doubt) you should upgrade to 10.6.8.