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The Apple Support Community will permanently close on November 20, 2026. Starting today, the site will no longer accept new posts and is available in a read-only state.
You can continue to find trusted guidance and support on the official Apple Support site.
We want to thank the community members who have contributed their time and expertise to help others with their Apple products.
Sd Cards (Sandisk 32GB) can no longer be encrypted using Disk Utility. Apple support had nothing useful to say, except referring to the SD Card Manufacturer.
It worked on OSX Sierra, but going back does no make sense to me.
MacBook Air, macOS High Sierra (10.13.6)
Assuming it has been re-formated to HFS+, and a GUID scheme it should allow for encryption unless something is wrong with it.
Thank you. Changing to GUID did the trick.
Have no problem encrypting hard drive or 16GB USB Stick.
You're welcome.
OSX High Sierra encrypting SD
