问题
I noticed after upgrading from 4.2 to 4.3.1 that there is no longer a 32 bit mode option in the Get Info for Xcode. How would I run Xcode 4.3.1 in 32 bit mode now?
回答1:
You can't. Xcode is now 64-bit only -- there's no 32-bit code in it anymore.
If you had some plugins which were previously 32-bit only, you will need to upgrade them.
回答2:
If you run your mac in 32 bit mode (when you start the computeer with "3" and "2" key) you will have your machine and their programs in 32 mode.
来源：https://stackoverflow.com/questions/9791234/open-xcode-4-3-1-in-32bit-mode