Can you tell us what program or application you are trying to install or run?
Can you confirm you are using a Mac machine with your Magic Jack?
If so I will need to move this so the Mac experts can help you with this.
Let me know
Can you tell me what version of OSX you are using?
Can you click the apple icon at the top left of your screen then choose about this Mac and tell me what it says?
That is exactly what I needed to know, Basically the message you are getting is because your mac is a Power Processor model not an Intel Processor model.
For the Magic Jack to work you have to have an Intel Mac as it states on the right hand side of their specifications page here http://www.magicjack.com/1/requirements.asp
I am sorry to say but as your Mac is a G4 there is no way around this issue and the Magic jack will not work for you.
Please let me know if you need more info or clarification.
Unfortunately not, As your machien is a G4 processor not an Intel chip the Magic jack will not work with your machine.
Even if you were to try something as extreme as loading Windows on your Mac the processor you have would prevent the Magic jack from working.
I am sorry that I could not be the bearer of good news but there is nothing you can do short of getting a newer Intel Mac.