How to disable 'developer mode' for xcode?

It is simple, just type:

DevToolsSecurity -disable

in a terminal window

it is from: here

.gitignore for xcode project

Copy from this link

*.DS_Store

# Xcode
*.pbxuser
*.mode1v3
*.mode2v3
*.perspectivev3
*.xcuserstate
*.pbxuser
*.perspective
project.xcworkspace/
xcuserdata/

# Generated files
*.o
*.pyc


#Python modules
MANIFEST
dist/
build/

# Backup files
*~.nib

# vim
*.swp
*~ 

-- update Oct 29 2012 --

I think the official gitignore (github) should be better :) 

link: https://github.com/GitHub/gitignore

How to import Xcode project into bitbucket

BitBucket supports private repository for free users, so it is very suitable for hosting our Xcode projects :)

When you signup your free account, and create a new project for yourself, the problem is coming, how to import your xcode project into the bitbucket?

1. Create your SSH key

First, you need to update your SSH key(s) into bitbucket, as we're OS X users, so it is very :)

1.1 Check your SSH key

In console, type:

$ls ~/.ssh<enter>

If there are id_rsa and id_rsa.pub exist, you've already got your SSH keys, so skip the next step.

1.2 Create your SSH key

In console, type:

$ssh_keygen<enter>

The program will ask you for a passphrase, you can just take it as a "password". And when the program finishes, there will be two files in your ~/.ssh

• id_rsa - which is your private key, you need to protect this file, don't be touched by others.
• id_ras.pub - which is the pub key, you can upload / send this file to others, such as bitbucket.

So we have our SSH key, then we upload it to bitbucket

2. Update your SSH key to bitbucket

Go to Bitbucket settings, click the "choose key", and browser to your id_rsa.pub (you may need to copy it to some directory that the finder can locate it, for example, in console, use: cp ~/.ssh/id_rsa.pub ~/ ), then click the same button, it should be "update key", after that, you public is uploaded successfully.

3. Upload your repository

I refer to this link, you need to:

1. Create a repository in bitbucket
2. Note the URL you should use is: git@bitbucket.org:youruser/yourepo.git
3. in console, go to your locale repository: $cd /path/to/my/repo
4. git push --mirror git@bitbucket.org:youruser/progbuenos.git

Then the local code will be uploaded to bitbucket, you can use git clone to fetch it back

How to update xcode via app store?

I just update xcode from 4.2 to 4.2.1 via App Store. However, after downloaded the latest version of xcode, there is nothing happens!
I searched the internet, and finally found that I must run /Applications/install xcode.app.... it means App Store only download the install package, and place it into /Applications, but doesn't run it for you.

You can click "install xcode" from launchpad, and follow the instructions.