Moving to Eastern Europe

I have a 21.5" iMac, Mid 2011 model; will I be able to use it in Europe? Is voltage in computer compatible with European voltage?

Apple devices are designed to operate world wide. Just make sure you purchase a kit that will allow you to adapt your US AC plug connector to whatever European country's AC mains that you encounter. Those kits are sold by Apple, Radio Shack, Office Depot, Best Buy, and many others.

Macs have a switchable power supply that will auto detect the local voltage (220 volts), so like chsag says, all you need is a US plug adaptor

Even better is to purchase a power lead locally when you arrive at your destination. Here Down Under we are 240 volts and any number of computer leads, Apple and others, works.

Thanks, all!