How to Save Photos on a MacBook Air to an SD Card

Plug the USB SD card reader into the MacBook Air's single USB slot.
Insert the SD Card into the appropriate slot in the card reader. The SD card will appear in Finder's sidebar as well as on the desktop.
Open the folder containing your photos on the MacBook Air.
Select the photos you would like to transfer. 'Edit' > 'Select All' to grab all items in the folder or Command-click to select multiple files. Drag the files to the SD card within Finder's sidebar. Allow the MacBook Air to copy the files over.
Control the SD card within the sidebar or on the desktop and select 'Eject.' Remove the SD card from the card reader.
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