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Input Channels are Missing

There are several reasons why channels may be missing in the Logic software. Please follow the troubleshooting guide below to find the source of the issue.

Check that the Channels are Enabled

The appropriate channels should be properly highlighted in the Logic capture settings as shown below.
Enable channels under Logic's capture settings

Show All Channels

Sometimes, channels may be hidden from view even if they are enabled under Logic's capture settings. In this case, simply click the gear icon under any of the visible channels, and click Show All Channels.
Show all channels setting

Ensure the Proper USB Port is Used

Saleae Product
Minimum Required USB Port
Original Logic
USB 2.0
Original Logic16
USB 2.0
Logic 4
USB 2.0
Logic 8
USB 2.0
Logic Pro 8
USB 3.0 (USB 2.0 will have limitations)
Logic Pro 16
USB 3.0 (USB 2.0 will have limitations)
Logic Pro 8 and Logic Pro 16 can be used with USB 2.0 ports under certain limitations as described in the article below.
When used with a USB 2.0 port, Logic Pro 16 will only have 8 channels available, as opposed to having 16 channels available when used with a USB 3.0 port.