I have my dead PowerBook's HDD in an external USB enclosure, and have set it to the boot disk on my Intel based iMac. It loads up fine, but I cant access the System Preferences (architecture not supported it says). The Airport sees (and appears to be connected to) my wifi network, but neither Safari nor Firefox can connect to the internet. I need to update my iPhone and I need to authorize my computer otherwise it will wipe loads of apps from my iPhone. Any suggestions to get around this and gain internet access?