mikrotik hotspot see the mac address of sxt and not the mac of the client's mobile or laptop
my network topology is:
1Mikrotik router 2011=>ubiquity airgrid m2 (ap)=>airgrid m2 (station)=>bullet2 (ap)=> [MIKROTIK SXT LITTE 2 (station)
please help me

One of the device acts not as transparent bridge between MikroTik HotSpot and end client.
Make sure all device are configured as bridge, then you will get MAC-address of client.

no the problem is with mikrotik sxt.How to do transparent bridge?

no the problem is with mikrotik sxt.How to do transparent bridge?

The SXT needs to do WDS.
Make sure the bullet has wds enabled also.
WDS is what allows client ethernet device MAC addresses to go through 802.11 land, where normally, only station radio MAC addresses should be.

wds is enabled on bullet but is not enabled on sxt and i don't know how to enable it! Can you help me?

wds is enabled on bullet but is not enabled on sxt and i don't know how to enable it! Can you help me?

Wireless mode -> station WDS (or maybe try WDS slave)

I think the WDS tab is for the AP side, but you can always set that to dynamic and default bridge = the bridge you have configured already.

I had such a bridge that was pure Mikrotik set up at my house. When I get home I'll boot up the client and see what settings I used on that end because now I'm curious myself what I did.