redsnow crashes (mac)

[mrporridge]

I'm jailbreaking iphone 4, 4.3.5
using redsnow 0.9.8b4

I get into DFU, its starts the jailbreak, then it crashes (I get a message saying that I need to restart my macbook, and my phone goes white)
I then fix with tinyUmb

Any ideas as to why it crashes?
I've read about changing CPU, is this necessary for Mac?

thanks
ps I dont have 4.3.3 blobs saved
I'm stuck on 4.3.5

 

[labman]

what OS are you running lion/leopard?

 

[mrporridge]

snow leopard
10.6.7
itunes 10.4

 

[Carlanga]

you could try running reds0w in Bootcamp if you have windows installed.
sometimes changing the usb port or using a hub helps also.