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<blockquote data-quote="Lifeisabeach" data-source="post: 1640471" data-attributes="member: 38864">Open up &quot;About This Mac&quot; from the Apple menu, then System Report.&nbsp; If you see &quot;Card Reader&quot; listed on the left, then at least you know the system still knows you have that in place.&nbsp; If it does not show up here, then you may have a much more serious problem (missing kernel extension perhaps, or a hardware failure).If you do see it, then it may be dirty and need cleaning.&nbsp; Here's a YouTube video posted by someone who was able to fix his using alcohol and an SD card he couldn't use anymore.&nbsp; There are links to other videos, so feel free to peruse more of them.&nbsp; Obviously, only do this with the MacBook unplugged and pop the battery if possible (if not, make sure it's powered off... better yet, drain the battery to nothing).<a href="https://www.youtube.com/watch?v=SGh3jra4ApE" target="_blank">https://www.youtube.com/watch?v=SGh3jra4ApE</a></blockquote>

[QUOTE="Lifeisabeach, post: 1640471, member: 38864"] Open up "About This Mac" from the Apple menu, then System Report. If you see "Card Reader" listed on the left, then at least you know the system still knows you have that in place. If it does not show up here, then you may have a much more serious problem (missing kernel extension perhaps, or a hardware failure). If you do see it, then it may be dirty and need cleaning. Here's a YouTube video posted by someone who was able to fix his using alcohol and an SD card he couldn't use anymore. There are links to other videos, so feel free to peruse more of them. Obviously, only do this with the MacBook unplugged and pop the battery if possible (if not, make sure it's powered off... better yet, drain the battery to nothing). [url]https://www.youtube.com/watch?v=SGh3jra4ApE[/url] [/QUOTE]

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