Edimax EW-7811UAC User Manual page 19

6. Move the cursor to the file you downloaded and double click to extract it.
Copy the driver to the USB adapter first if you downloaded the
driver on another Internet-Enabled device then insert the USB flash
drive to the computer you will use the Wi-Fi USB adapter.
7. Once the driver is uncompressed, you will see a new folder.
8. Access the folder and click "Install.pkg" to continue.
9. Click "Continue" to start installation procedures.
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