Need proof?
Here ya go.
Internet Explorer (dropped support )
After the OS vendor (Apple) commits to shipping browser with the OS.
Plus for a while didn't exactly help their "but IE has to be embedded into the OS " antitrust arguments when IE is still there in plain view on Mac OS X as an optional Application.
It is asinine anyway. If just follow industry standards Microsoft can just SKIP writting a browser for the Mac and still get to take advantage of the standard platform provided. ( there is no money made in shipping a free browser. ) There is not just one but TWO standards supporting browsers on Mac OS X Safari and Firefox. What exactly would Microsoft bring to the party other than old crappy legacy IE quirks. If they want old crappy IE quirk lock in ... wouldn't that make them more money if just keep IE on windows?
Office makes Microsoft gobs of money on the Mac still.
Windows Media Player (dropped support)
again. Direct head-to-head with Apple via Quicktime.
Works out agreement with Flip4Mac for free player. (with pointers from their site).
And by rumors..... Quicktime X plays with the more standard codecs.
Messenger (limited functionality)
again OS vendor offers 'iChat' on rival network. AOL also stopped
trying too. Yahoo's client also lags.
Get AdiumX . That's part of it. Between Adium and iChat going to snag most of the folks. Left with even smaller audience on an even smaller platform.
Microsoft Office (Used to be good, now sucks on Mac, no VB Macros support, and we PAY MONEY for this. )
this has been hashed out to DEATH on the web. VB in apps is a huge hack. On Windows and on Mac. Slightly more of a hack on Mac since was very hooked into PowerPC specifics. To reimplement was going to be a major effort piled on top of reimplementing the whole QA testing chain and major chunks of the application's build and adding deeper Cocoa ( getting off Carbon).
Over a year ago they put word out that Mac Office 2010/2011 would bring it back.
http://www.betanews.com/article/Next-OfficeMac-will-bring-back-VBA-support/1210717012
And yet... folks are still moaning about it. If Microsoft had slipped Office 2008 till 2009 just to get a replacement in folks will be moaning about how old Mac Office was and how it was abandoned.
There are finite amounts of developers/resources available.
Personally I think to some extent Microsoft thought that .Net/Common_Language_Infrastructure would replace VBA on both Windows and Mac. I think they seriously misjudged how much cruft and legacy mystery code folks had layered on top of VBA at this point.
Silverlight- developer tools are only on Windows. Mac users have to take what we get.
Right so there are iPhone development tools available on Windows?
There is a huge difference between end user run times and development tool stack.
Besides don't need Silverlight to do the most of what the Web version office does. No way it is going to pop up on smartphones and require Silverlight to do anything significant. That would be entirely missing the point of the utility many folks will get out of the web version. The super-supreme disco powerpoint presentation with embedded video.... probably will require silverlight. However, most folks can get by without that.