Three reviews of Mac OS X Leopard, to be released coming Friday. David Pogue writes: “Leopard is powerful, polished and carefully conceived. Happy surprises, and very few disappointments, lie around every corner. This Leopard has more than 300 new spots – and most of them are bright ones.” Walt Mossberg concludes: “Leopard isn’t a must-have for current Mac owners, but it adds a lot of value. For new Mac buyers, it makes switching even more attractive.” Edward C. Baig of USA Today writes: “With Leopard, Apple’s operating system widens its lead aesthetically and technologically. Whether the sixth major release of OS X in as many years puts a dent in Microsoft’s dominant market share is another matter entirely.” Thanks to MacWereld.nl [Dutch] for pointing these reviews out.