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Getting "app is damaged and can't be opened" errors on your Mac? Here's the fix!

<div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even" property="content:encoded"><p><a href='http://www.imore.com/getting-app-damaged-and-cant-be-opened-errors-your-mac-heres-fix' title="Getting &quot;app is damaged and can't be opened&quot; errors on your Mac? Here's the fix!"><img src='http://www.imore.com/sites/imore.com/files/styles/large_wm_blw/public/field/image/2015/09/os-x-el-capitan-imac-5k-hero.jpg?itok=IJkYEdy7' />[/url]</p> <p class="intro">If you're being told an app is damaged and can't be opened, here's what to do!</p> <p>Apple seems to be having trouble with the security certificate for the Mac App Store (http://www.imore.com/mac-owners-have-trouble-using-apps-after-security-certificate-snafu) this week and, while they've issued a new one, not every Mac seems to have picked it. So, if you're trying to launch an app and all you get is the "damaged and can't be opened" popup, here's what you need to do.</p> <p>Note: This also works when a Mac App Store app is reported as being damaged for other reasons.</p> <h2>How to fix a damaged app that won't open on the Mac</h2> <ol><li>Reboot your Mac.</li> <li>Open your <strong>Applications</strong> folder either by using the Finder or searching in Spotlight.</li> <li>Find the damaged app and <strong>delete</strong> it.</li> <li>Enter your <strong>Mac user password</strong> to authorize deletion, if requested.</li> <li>Launch the <strong>Mac App Store</strong>.</li> <li>Make sure you're logged in. (You may need to re-enter your password even if you were previously logged in.)</li> <li>Go to the app you just deleted, either in your Purchased tab or by searching for it.</li> <li>Click on <strong>Install</strong> to re-download it.</li> </ol><p>I only had to re-enter my password to get some apps up and running again. Others I had to delete and re-install. All are working for me again. Hopefully yours are too!</p> <div class="devicebox"> <h3>OS X El Capitan (http://www.imore.com/os-x-el-capitan)</h3> <p><img src="(http://www.imore.com/sites/imore.com/files/field/image/2015/09/os-x-el-cap-thumbnail.jpg)" alt="OS X El Capitan" /> (http://www.imore.com/os-x-el-capitan)</p> <ul><li>OS X El Capitan review (http://www.imore.com/os-x-el-capitan-first-look)</li> <li>OS X El Capitan help (http://www.imore.com/os-x-el-capitan-help)</li> <li>OS X El Capitan news (http://www.imore.com/os-x-el-capitan)</li> <li>OS X El Capitan discussion (http://forums.imore.com/os-x-el-capitan/)</li> </ul></div> <div> <style> <!--/*--><![CDATA[/* ><!--*/ <!--/*--><![CDATA[/* ><!--*/ <!--/*--><![CDATA[/* ><!--*/ .devicebox { background-color: #5CB8DB; border: 1px solid #E2E9EB; float: right; display: block; margin: 0 0px 10px 10px; max-width: 350px; overflow: hidden; width: 50%; } .devicebox h3 { background: #8D98BD; font-family: "camptonmedium",sans-serif; font-size: 20px; margin-bottom: 0; margin-top: 0; padding: 0; text-align: center; } .devicebox h3 a { display: block; line-height: 30px; padding: 0 10px; } .devicebox h3 a:hover { background: #7e88aa; text-decoration: none; } .devicebox .video { margin: auto; } .devicebox p, .entry-content .devicebox p > img, .devicebox img { margin: 0px; max-width: 100%; padding: 0px; } div .devicebox *, div .devicebox li, div .devicebox a:active, div .devicebox a:hover, div .devicebox a:link, div .devicebox a:visited { color: #fff; } .devicebox a:hover { text-decoration: underline; } .devicebox p, .devicebox ul li, .devicebox ol li { font-size: 16px; padding: initial; } .devicebox ul { margin: 0; padding: 0.5em 1em 1em 30px; } .devicebox ul li { display: list-item; line-height: 24px; list-style: disc outside none; } .devicebox ul li:before { display: none; } .devicebox p ~ p { padding: 0px 15px 15px; line-height: 1.25; } .devicebox p:first-of-type + p { padding: 15px; } div *:last-of-type + .devicebox, div *:last-of-type + div ~ .devicebox { float: none; margin: 0 auto 30px; max-width: 700px; min-height: 225px; position: relative; width: 100%; } div *:last-of-type + .devicebox .video, div *:last-of-type + div ~ .devicebox .video { bottom: 0px; left: 50%; position: absolute; right: 0px; top: 30px; } div *:last-of-type + .devicebox .video_iframe, div *:last-of-type + div ~ .devicebox .video_iframe { height: 100%; padding: 0px; } div *:last-of-type + .devicebox h3 + p, div *:last-of-type + div ~ .devicebox h3 + p { bottom: 0; left: 50%; overflow: hidden; position: absolute; right: 0; top: 30px; width: 50% } div *:last-of-type + .devicebox h3 + p img, div *:last-of-type + div ~ .devicebox h3 + p img { height: 100%; width: auto; } div *:last-of-type + .devicebox ul, div *:last-of-type + div ~ .devicebox ul, div *:last-of-type + .devicebox p, div *:last-of-type + div ~ .devicebox p { width: 43%; } @media all and (max-width: 500px) { .devicebox { float: none; margin: 0 0 30px; max-width: 100%; width: 100%; } div *:last-of-type + .devicebox .video, div *:last-of-type + div ~ .devicebox .video { left: 0; position: relative; top: 0; } div *:last-of-type + .devicebox .video_iframe, div *:last-of-type + div ~ .devicebox .video_iframe { padding-bottom: 56.25%; } div *:last-of-type + .devicebox h3 + p, div *:last-of-type + div ~ .devicebox h3 + p { left: 0; position: relative; top: 0; width: 100%; } div *:last-of-type + .devicebox ul, div *:last-of-type + div ~ .devicebox ul { width: auto; } } /*--><!]]]]]]><![CDATA[><![CDATA[>*/ /*--><!]]]]><![CDATA[>*/ /*--><!]]>*/ </style></div> </div></div></div><br clear='all'/>

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