Installing Xcode on OS X Yosemite – Step-by-Step Guide

Confirming couple of points

1. You are running OSX 10.6.8
2. Current Xcode version in your machine is 3.2.4

Xcode 4.2 should work fine on your machine. I have a snowleopard machine at office running Xcode 4.2, i updated it via the Mac App store only. Ok. If this is not working via Mac App store, then go to your developer account (free or paid) and then download the Xcode version for Snow Leopard and install it manually. Just make sure you are downloading the Snow Leopard edition not the Lion edition. Please don't hesitate to ask for assistance :-)

Edit : Here i am attaching a snapshot of where to find the link . You need to scroll down and check in the Downloads section.

I had a similar problem with one of the Xcode 4 versions. What worked for me was to log in to Apple Developer Network (this will work with your free developer account login), at https://developer.apple.com/xcode/

Although that page says to get the most recent version of Xcode at the App store, there is a link that says "For past versions of Xcode or additional tools -- view downloads".

• Click the downloads link
• Unselect all of the checkboxes on the left except "Developer Tools", type "xcode" in the box at the top of the left column, and hit Enter
• The top result will be Xcode 5 - click the disclosure triangle to view the download link for it.
• Download the .dmg, double-click on it to mount it and run the installer

Note that the downloads page says that Xcode 5 requires OS X 10.8.4.

As I mentioned, this worked for me when the App Store locked me out with one of the Xcode 4 versions. If this happened to you, please leave a comment indicating whether this solution works for you.