[coryl]

Here's a quick tip: you can also disable arc for older libraries should you need to integrate them into your ARC project.

Just use the -fno-objc-arc flag (http://stackoverflow.com/questions/6646052/how-can-i-disable...)

[wsc981]

Alternatively you can also enable ARC for classes. This might be useful when you're working with a non-ARC project and want to include some ARC code. Use the switch -fobjc-arc to enable ARC for selected classes.

I'm currently using this switch to gradually migrate a non-ARC project to ARC.