MARTHI  Very kind developer! On two occasions, he corrected his app during less than a day. Recommended!  
(Version 1.8.2)

HELIOS9  Just checked the realtech-VR forum. A post there says, "SkyORB 08 has been released (1.8.0).

Note: It has been only tested for MacOSX 10.5 Intel and Windows XP and Vista (Geforce 8 on both)."

So, I guess, it's not intended for OS 10.4. Nor PPC Macs either, perhaps?  
(Version 1.8)

HELIOS9  Looks intriguing but crashes when trying to launch, here, every time.

Crash log says,

"EXC_BAD_ACCESS"

"KERN_INVALID_ADDRESS"

  
(Version 1.8)

RAMPANCY  Same as William Schaff. No go on an MBP C2D, 10.4.9.  
(Version 1.6.7)

JAVIERHZ  The problem seems to be graphic card related. It doesn't work with Intel GMA 950. I've tested on different machines and found it works fine when not using an Intel graphic card.  
(Version 1.6.6)

WILLIAM SCHAFF  screenshots look cool

App wouldn't launch intel osx 10.4.9, developer kit, x11, etc

v3xshader load failed  
(Version 1.6.6)

ANDYS  I installed it with no problems and was very impressed with the quality of graphics, the speed of the software and the amount of available information.

I will probably only be using 1% of the data provided by this software at any given time, but I can definately recommend it for depth of information, layout and overall "wow" factor. Great graphics.

MacBook Pro, 1GB RAM, 10.4.7  
(Version 1.6)

DR_LHA  Crashes when I try to click on Local Sky. This is on an Intel Mac Mini.  
(Version 1.6)