How to Quickly Vet your Applications for Lion Compatibility (and Why You Should)

OS X Lion is coming, probably this week, and it looks to be a compelling upgrade (and affordable at a reported $29 in the U.S., or $49 for a five-license family pack).  No trip to the store is needed-- it will be available exclusively over the Internet via the App Store, which you'll find under the Apple logo up at the upper left corner of your screen on your fully-updated Snow Leopard machine.

Photo courtesy of Apple.  Read all about OS X Lion on Apple's site

With Lion, Apple is finally cutting the cord of the long-obsolete PowerPC architecture. Until now, programs written specifically for the ancient PowerPC chips would still run on Macs based on Intel chips via an automatic emulator that OS X would use. This emulator was called Rosetta... and it's finally been put out to pasture in the era of Lion.

There are many reasons why this is good--faster operation, fewer bugs, conservation of disk-space, better and more consistent user-interface features, smoother integration--but the one obvious negative is that you might currently have applications on your Mac that rely on Rosetta. That software will have to be upgraded or removed.

Now, you could go through your Applications folder and look at each application's type by command-clicking Get Info. But there's a much better way to do it all-at-once (Hat tip: Cult of Mac).

Here's How:

• Open the Terminal. (If you don't know how to do this, just type "Terminal" in Spotlight and it will show up as an application.)

• Cut the following line from here:
  
  

  system_profiler SPApplicationsDataType >~/Desktop/MyFileTypes.txt

  
  ...and paste it into the Terminal, then hit the Return button on your keyboard.
  
  What will happen now is that a text file entitled MyFileTypes will appear on your desktop. It might take a couple minutes.  Go have a cup of tea while your Mac does your work for you.

• When the process is complete, quit the Terminal and double-click the MyFileTypes file on your desktop.

Now you can search MyFileTypes for the word "PowerPC" --this will indicate which applications on your machine need to be upgraded, removed or replaced with something more modern.

The most common obsolete applications are Microsoft Office 2004 and Quicken. To my chagrin, LabVIEW 8.6 is there, too.  (That's a real surprise-- it's so fast, I had no clue it was being run in the emulator.)  (UPDATE: It appears the Rosetta issue for LabVIEW 8.6 is limited to drivers, though there is an additional 32-bit issue with kexts.)

Deal with obsolete apps before upgrading to Lion
For one thing, the removal utilities that come with some of them (such as Microsoft Office) are themselves PowerPC-based. Or, you may need the old version to export your files to some new, Rosetta-free application-- and I'm talkin' to you, Quicken-- for which there is no Intel- or Universal-based update.  Fortunately, in the case of Quicken there are many alternatives.  See this superb list compiled by TUAW after Intuit, Quicken's publisher, sent an infuriating email to its users with lame suggestions on how to work in the post-Lion world.  Really, now, Intuit: on pg. 102 of Scott's Big Book of Pithy Pronouncements is: "Competitors are made, not born."  Q.E.D.