How do I turn on isight on a mac for ichat?

Test in applications like iChat, PhotoBooth, and iMovie HD 6 - if it is only not working in one of the apps, reinstall that Appplication. if none work, move on

Create and Test in a new user if none work in this user, reset the SMC

At this point I am going to give you a link to an article that is specifically designed for troubleshooting iSIght. I do not know what kind of mac you have so, that is why, good luck. !

(oh on newer macs 07/08 + just remove battery if it has one and then remove every cable from the computer. leave it unplugged with no power or peripherals. Than after two minutes you can reconnect it and then log in your user and test.

Here is the article link: http://support.apple.com/kb/HT2090

Links contents:

How to Troubleshoot iSight

Summary

Before you submit your camera for service, try the steps below to identify and resolve issues with your iSight camera.

Important: Follow these instructions in order. Test the camera between steps to see if the issue is resolved.

Products Affected

~ iSight

~ Built-in iSight cameras

These steps are for iSight cameras that are built into a computer, such as the iMac G5 (iSight) or later, the MacBook, or MacBook Pro.

1. See if the issue is application-specific.

Try another application (iSight works with applications like iChat, PhotoBooth, and iMovie HD 6) to see if the iSight camera exhibits the same behavior in all applications. If it only happens in one application, try reinstalling that application.

2. See if the issue is user-specific.

Test your iSight camera in another user account. If the issue only occurs in one user, the issue would be isolated to user settings.

3. Find out if the computer recognizes the iSight

(or click on apple, about apple, more info)

Check System Profiler (in the Utilities folder, inside the Applications folder). Under the USB header, check to see if the iSight camera is detected.

4. Reset SMC or PMU

Reset your computer's SMC or PMU, and then check System Profiler again. (SMC reset instructions for iMac G5 (iSight), Intel-based iMacs; PMU reset instructions for MacBook and MacBook Pro.)

If your built-in iSight camera is still not behaving correctly after trying all these steps, you may need to contact Apple or an Apple-Authorized Service Provider for service.

Standalone iSight cameras

The instructions in this section apply if you have an iSight camera that is not built into your computer but attaches to the computer via a FireWire cable.

1. Make sure the cable is completely plugged in.

Incomplete cable connections are the most common cause of hardware problems. Follow these quick instructions to make sure your iSight cable is completely plugged in.

1. Turn the computer and the camera off.

2. Unplug the FireWire cable from your computer and the camera.

3. Wait a few seconds.

4. Firmly, without forcing, plug the cable back in to the camera and the computer.

Caution: FireWire ports are keyed so the FireWire cable can only be inserted one way. Make sure you are inserting the FireWire cable into the FireWire port in the correct orientation.

5. Restart your computer.

6. If the green light on top of the iSight is not lit, turn on the camera by gently twisting the lens.

7. Launch iChat AV.

If your iSight camera continues to function improperly, continue on to the steps below.

2. See if a different FireWire port works.

Some Macs have more than one FireWire port. If your computer has another FireWire port, disconnect the iSight camera from the current port and plug it into the other one. Restart your computer and test the camera before continuing to step three.

3. Check to see if other FireWire devices work.

If you have another FireWire device, such as a video camera or an external hard drive, try plugging it into your computer to see if it works. If your other FireWire devices work, this means that your computer's FireWire port is working correctly. If your other FireWire devices don't work, there may be an issue with your computer. Contact an Apple Authorized Service Provider for assistance.

4. Determine if there is an incompatibility with another FireWire device.

If more than one FireWire device is connected to your computer, there may be an incompatibility between two of the devices. To rule this out, disconnect all other FireWire devices from the computer, including external hard drives, CD/DVD drives, other cameras, and FireWire-based networking equipment, such as hubs and repeaters. If your iSight camera works normally when you remove other FireWire devices, plug them back in one at a time to isolate the cause of the issue.

5. Make sure the FireWire cable is good.

Follow these steps to test the FireWire cable:

Assuming you have a Mac with a camera in it (like a MacBook or iMac), just turn on iChat. Then at the top menu bar under "video" turn on camera enabled and microphone enabled and screen sharing enabled. That's it. You can click on "video preview" to see what you look like until you find someone to video chat with.

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