It seems that the directory for the iOS Simulator has changed. It used to be in ~/Library/Application\\ Support/iPhone\\ Simulator/ and now it\'s in ~/Lib         
        
Steps for iOS simulator.
Steps for iPhone/iPad.
Goto Charles Menu -> Help -> SSL Proxying -> Install Charles Ceritificate on a Mobile device or Remote browser -> Select -> popup appear with below steps `
Configure your device to use Charles as its HTTP Proxy on 192.168.0.100:8888, then browser to chls.pro/ssl to download and install the certificate.
Goto iPhone settings -> Wifi -> click selected wifi -> Http proxy -> Configure proxy -> select Manual -> Give server as 192.168.0.100 and port as 8888 -> Save
Goto iPhone browser -> Load chls.pro/ssl -> It will show below popup `
The website is trying to download a configuration profile. Do you want to allow this? Ignore button and Allow button
Click Allow button -> It will download the profile