How to Get Xcode to Not Automatically Open Previously Opened Projects

I've recently had a similar problem. I tried the methods above and could launch Xcode from the command line, but as soon as I tried to open from the finder, it would try to open the "bad" document and hang.

I eventually resolved it by removing the contents of :

~/Library/Autosave Information/
~/Library/Saved Application State/com.apple.dt.Xcode.savedState

This seems to have fixed it for me.

I just spent half the day stressing over a very similar issue. I had tried updating and reinstalling Xcode - but the problem still persisted. Thankfully, a few minutes ago, I managed to solve this by doing what your question states with the help of this post.

Basically, I opened another Xcode project (it can be any file, though) from the terminal using the following command:

open -a /Applications/Xcode.app app.xcodeproj/ --args -ApplePersistenceIgnoreState YES

This successfully launched Xcode with the standard 'Welcome to Xcode' dialog box you usually get. Hope that helps!

Press option+Shift when clicking on the Xcode icon in the dock. Xcode then starts without opening previously used projects. This is related to version Version 4.5.2 (4G2008a) but I am almost sure that I used it in older versions as well.