As noted today on MacRumors Apple to Halt Mac Pro Sales in Europe Effective March 1 Over Regulatory Requirements However they fail to mention the specifics of why it fails to meet "Amendment 1 of regulation IEC 60950-1, Second Edition" ?
Apple today issued a notice to European distributors indicating that it will halt sales of the Mac Pro in Europe and select other countries as of March 1 due to new regulatory requirements going into effect on that date. The move will affect all European Union countries, as well as EU candidate countries and the four European Free Trade Association countries: Iceland, Liechtenstein, Norway, and Switzerland.
As of March 1, 2013, Apple will no longer sell Mac Pro in EU, EU candidate and EFTA countries because these systems are not compliant with Amendment 1 of regulation IEC 60950-1, Second Edition which becomes effective on this date. Apple resellers can continue to sell any remaining inventory of Mac Pro after March 1.