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OS X (or macOS) El Capitan offers two installation methods. In this guide, we'll focus on the 'clean install' method. It replaces the contents of a selected volume with a new, pristine version of El Capitan (10.11). One problem that may crop up for OS X users is e-mail servers rejecting passwords sent to them by Mail, resulting in a warning and a request to enter your password again. Oct 26, 2016 I'm slightly worried that it may be some malware that is doing this. I almost never reenter my password in these popup windows. Instead, I open up Preferences/Interent Accounts and enter my password(s) there. When these popup windows asking for my email passwords appear, in 'Mail', the account is 'down' until I reenter the correct password.
When connecting to various online services, your Mac will use certificates to validate a connection. If a certificate being used for a connection is expired or invalid, then OS X will notify you of this when attempting to use it, and offer you the choice of continuing with the connection, inspecting the certificate, or canceling the connection. Such warnings are convenient for detecting an invalid connection, such as one that might be malicious, so if they happen then consider looking into them; however, there may be times when practically every connection you attempt gives you a certificate warning.
When this happens, it suggests a problem with your certificate configuration, more than a problem with the connections at hand, and this may happen for several reasons, which can usually be fixed by one of the following approaches:
1. Check your date and timeCertificate authentication requires your Mac’s time be in sync with the server you are connecting to, so if for some reason your Mac’s time is off, then you may get these errors. To fix this, go to the Date & Time system preferences, and ensure the option to “Set date and time automatically” is checked (click the lock to authenticate if this option is grayed out). Be sure the time server used is one that is appropriate for your location, and then close the system preferences. Within a few moments, OS X should adjust your system clock, which should clear the certificate errors.
There are still various El Capitan Mail issues that some people are having including mail not sending in El Capitan, mail not being received and many more frustrating bugs. On October 21st Apple released the El Capitan 10.11.1 update which claimed to have fixed Apple Mail problems with outgoing server issues and message display problems.
Mac system requirements for el capitan free. Whenever you have certificate and authentication errors, be sure your system’s clock is accurate. You can ensure this is always the case by using a dedicated time server for your system.
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2. Change trust settings for specific certificates
If this is happening only for specific certificates, and you trust that the service you are connecting to, then you can modify the trust settings for the certificate to allow the authentication to proceed. To do this, open the Keychain Access utility (in the Applications > Utilities folder), and select your login keychain. In here, click the Certificates category, and then locate the certificate for the service you are connecting to. You can do this by searching for the domain name of the service, or by sorting the certificates by name and scrolling through them.
If a certificate has a red “X” symbol on its icon, then this means the certificate has expired or is otherwise invalid. In these cases, you can right-click the certificate and remove it from your system. If the connection requires one, then it will be downloaded from the service again the next time you connect and authenticate.
Start by choosing this option to remove custom trust settings for your certificate, but also consider adjusting specific trust settings that pertain to your connection.
If the certificate has a blue plus symbol, then this indicates custom trust settings for the certificate, which may be the reason for the faults you are experiencing. For instance, a certificate may be used for SSL validation, but if this trust setting is not set up properly, then OS X will prompt you to use this certificate every time an SSL connection attempts to use it. Fixing this requires adjustment of the trust settings for the certificate:
- Double-click the certificate in Keychain Access to open it
- Expand the “Trust” settings section
- Choose “Use System Defaults” from the top-most menu
The system defaults setting should have the certificate used for the appropriate connections on demand; however, you can also attempt to manually adjust the custom trust settings for the certificate. For instance, if you get this certificate error only when using a Kerberos single sign-on password, you might choose “Always Trust” for the Kerberos Client trust setting. You can try similar options for the other trust settings, but only enable those that the certificate is specifically used for.
3. Reset your keychain
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Finally, you can take steps to reset your Mac’s keychain certificates. While you should not need to clear your entire keychain and set it up from scratch again, you can select and remove the certificates that are mentioned by these errors. Doing so will have the system re-download new certificates for connections that demand them, potentially overcome configuration errors in the prior certificates. Note that you should only do this for your account’s login keychain. There is a special keychain called “System Roots” that contains a number of certificates. These are public certificates issued by numerous trusted certification authorities, and are used to validate certificates issued by online services to which you connect. Removing or modifying these will break your ability to validate connections, so it is best to leave these alone.
If your Mac is connected to the Internet but suddenly starts asking for your password, you should generally try again later, and if necessary work with your email provider to resolve. If you're using Apple's iCloud Mail, learn how to resolve issues with iCloud Mail.
Why is Mail asking for your password?
Mail asks for your password when it is connecting to your email provider, but can't connect to your email account because your email provider isn't accepting your email password.
Your email provider may reject your password for several reasons, including:
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- You're not using your current email password. If you updated the password on another device, make sure that you're using the same password on your Mac.
- Your email provider needs you to update or reset your password for security reasons. For example, if you're using Google’s two-step verification, your Gmail account in Mail requires the appropriate app-specific password.
- Your email provider deactivated or suspended your account. Contact your email provider for help.
Check your password in Internet Accounts preferences
Depending on the type of email account you're using, you might be able to correct the password as follows:
- Quit Mail. If it doesn't quit, you can force it to quit.
- Choose Apple menu > System Preferences, then click Internet Accounts.
- Select your mail account in the sidebar.
- If you see a password field for your account, delete the password and type the correct password.
- Close System Preferences, then open Mail and try using your account again.
If Mail still asks for your password, the password is probably incorrect. Your email provider can help you verify your email settings and make sure that you're using the correct password.
Test using webmail
Many email providers offer webmail, which is a way to use email with a web browser such as Safari, instead of with an email app such as Mail. For example, if you're using an iCloud Mail account, you can use iCloud.com to send and receive email.
Because the password that you use with Mail is usually the same password that you use with webmail, try signing in to webmail with that password. If it doesn't work there either, your password is probably incorrect. Your email provider can help you verify your email settings and make sure that you're using the correct password for the Mail app.
Remove your account, then add it back
If no other solutions work, try setting up your email account again. To do that, first remove your email account, then add the account back.
Learn more
- If you're using Apple's iCloud Mail, learn how to resolve issues with iCloud Mail. The password that you use with iCloud Mail is your Apple ID password. Learn what to do if you forgot your Apple ID password or want to change your Apple ID password.
- If you forgot or want to change the email password for a different email service, contact the email provider or request a password reset from their website.