Go to Apple menu > System Preferences, then click iCloud. Choose Account Details. If you're asked to enter your Apple ID password, click "Forgot Apple ID or password" and follow the onscreen instructions. read more
If you have issues when you try to sign in with your Apple ID password, use these steps to reset it and regain access to your account. read more
Open iTunes, then choose Account > View My Account. If you’re signed in to iTunes with your Apple ID, you'll see your account name and email address. Open App Store, then select Store > View My Account. Open iBooks, then select Store > View My Apple ID. Open FaceTime, then select FaceTime > Preferences, then click Settings. read more
You will be asked to create a new password for your Apple ID. If you asked to retrieve your Apple ID via email, you will receive an email with a password reset link. The email address you received the message on is your Apple ID. read more