SuperTab for YahooMail 1.0 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The actual developer of this free software for Mac is McTabs OU. The application lies within Communication Tools, more precisely E-mail.
From the developer:
SuperTab for YahooMail offers a fast and convenient way to use YahooMail on your Mac. The program allows you to set up an additional password, so no one else can access your mailbox. With this application, you can securely login to your e-mail without launching the browser. It has a minimalistic stylish design that doesn't clutter your screen. You can start a new message without launching any e-mail clients or browsers.
You may want to check out more Mac applications, such as Yahoo! Mailer, MiniSafari or IDsizer, which might be similar to SuperTab for YahooMail.
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