Double-click the ZIP file that you have downloaded. This extracts the file Setup Kitely.app.
Run the program.
You will see the usual warning about opening apps downloaded from the internet. Click "Open".
Setup Kitely will start:
You should have received your Organization, Username and Password from your organization administrator. Use them to login, and continue as prompted.
How to Run Firestorm
If you don't already have Firestorm then Setup Kitely will ask you to download and install it.
Download and install Firestorm like any other program. Then, run Firestorm. You'll get this error message:
(It's possible that you won't get this error message, if you've changed your security settings to allow running programs from anywhere. In that case, ignore this section: you can use Firestorm immediately. But most users will see this error message.)
Here's what you need to do next:
Click “Cancel” to dismiss the error message.
Open Finder, and go to your "Applications" folder
Right-click it and select "Open"
You'll get another warning dialog, but this time the dialog will contain an "Open" button:
Click "Open", and finally Firestorm will run.
Quit Firestorm. We only needed to get it to run once; from now on Firestorm will run without any problems.
The Setup Kitely program should still be running. Quit it, and then run it again. It will see that you have installed Firestorm, and will configure it for you.