"However I have a ton of extra software and plugins for it," he says.
And you don't need any extra software to open and read, but not edit, Office documents.
(With extra software, a Mac computer can also run Windows if you cannot decide which to choose).
Other systems, like the Nokia Symbian and the Palm WebOS can be made to sync, but may require extra software.
They track the location, remotely install extra software for capturing keystrokes and build a dossier of evidence that they pass on to local authorities.
There are some more basic online systems that don't depend upon adding extra software or asking the gadget to phone home.
The services include technical support and extra software to run on Linux, which can come in handy if you are new to Linux.
You can still decode the file to reveal the attached photo or document, but you will need an extra software program to do the work.
"The risk to Mac users at this time is too low, and the benefits provided by extra software are not worth the cost," Mr. Mogull said.
With more cameras and extra software capable of identifying individual players, a souped-up version could make a variety of refereeing judgments.
Another difference from Apple is that with Android, extra software might be needed to connect a phone to a computer for sharing a contacts list or music.
