AFAIK, Canada uses the same standard, and plug as the US. 120V @ 60Hz
hms84:
For the most part, every computer PSU I've come across is capable of US/Canada & European voltages. (One part, works every where).
Have you checked the back of the computer? I usually find a sticker with PSU specs, and/or a switch to toggle between the two standards (115/230). (Very important to set it correctly if it's there, or poof)!
I have the first gen Mac Pro...
After I bought mine, I heard recently that NEW iMacs are 110/220
But I don't know about new MacPros though...
Ohh wait, I just checked apple/imac and apple/macpro
For Mac PRo
Electrical and environmental requirements
ENERGY STAR configurations available6
Line voltage: 100-120V AC or 200-240V AC (wide-range power supply input voltage)
Frequency: 50Hz to 60Hz single phase
Current: Maximum of 12A (low-voltage range) or 6A (high-voltage range)
Operating temperature: 50° to 95° F (10° to 35° C)
Storage temperature: -40° to 116° F (-40° to 47° C)
Relative humidity: 5% to 95% noncondensing
Maximum altitude: 10,000 feet
While in iMacs:
Electrical and operating requirements
Line voltage: 100-240V AC
Frequency: 50Hz to 60Hz, single phase
Maximum continuous power: 200W (20-inch models); 280W (24-inch model)
Operating temperature: 50° to 95° F (10° to 35° C)
Storage temperature: -40° to 185° F (-40° to 85° C)
Relative humidity: 5% to 95% noncondensing
Maximum altitude: 10,000 feet
SO I think it's only the iMac!
ciao