A new release to the Mac App Store today is the Opera web browser that can be downloaded for free. The app seems to be exactly the same as the non Mac App Store version and identifies itself as version 11.01 and build 1206.
The app also includes its Presto layout engine, which would have been thought to be an infringement on Apple’s Mac App Store guidelines that state, “Apps that use non-public APIs will be rejected.” This raises the distinct possibility that browser engines may not fall under the private API category, in which case other browsers could soon be heading to the Mac App Store including Firefox that uses another layout engine called Gecko. Alternatively it is possible that an Apple reviewer has let Opera slip through without realizing, which has happened before with app reviews.
When bringing the Opera browser to the iPhone and iPad, they had run into similar guideline restrictions and were forced to only release Opera Mini that does not use their own browser engine but instead directs traffic through Opera’s servers to compress data. The more fully featured Opera Mobile which is available for Android and other mobile phones could not be released on the iPhone because of its reliance on their own APIs .








