NX Tether is Nikon's free tethering app. It captures and transfers, and that's about it. When it, or Lightroom, stops seeing your Nikon, the fixes are usually the same. Adobe's forum still has "Nikon Z8 firmware 2.0 breaks tether in Lightroom," and DPReview has threads about NX Tether after macOS updates.

Short answer: TETHER STUDIO replaces NX Tether on Mac for 100+ Nikon Z and D series bodies over USB, with live review, AI culling and client view, for $99 once. Set USB to MTP/PTP and quit NX Tether before connecting.

Nikon tethering fixes

Z8, Z9 and Z6 III over WiFi

On these bodies, WiFi transfers files but won't fire the shutter remotely. That's a Nikon limitation, not your setup. Use USB for tethered capture. USB tethering on the Z8 is very reliable.

The alternatives

PriceNotes
TETHER STUDIO$99 once100+ Nikon bodies, Z and D series, over USB
Lightroom ClassicSubscriptionWired. Z6 III from 14.0, Z50 II from 15.0
Capture OneSubscriptionTethers most current Nikon bodies

Full Nikon walkthrough: Nikon Z8, Z9, Z6 III and D850 tethering on Mac.

Frequently asked

What can I use instead of NX Tether on Mac?

TETHER STUDIO tethers 100+ Nikon Z and D series bodies on Mac over USB for $99 once. Lightroom Classic and Capture One tether Nikon on subscription.

Why can my Nikon Z8 not shoot tethered over WiFi?

Nikon Z8, Z9 and Z6 III WiFi supports file transfer only, not remote capture. Use USB for tethered shooting.

How do I set up a Nikon for tethering on Mac?

Set USB to MTP/PTP, power-cycle the camera, connect a USB data cable, quit NX Tether and Image Capture, and connect in your tethering app.

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