Einstein-Æther gravity in the light of event horizon telescope observations of M87*

We investigate Einstein-\AE ther gravity in light of the recent Event Horizon Telescope (EHT) observations M87*. The shape and size observed black hole shadow contains information geometry its vicinity, thus one can consider it as a potential probe to different gravitational theories, since involved calculation framework is enriched with size-rotation features well extra model parameters. In case solutions include two classes depending on \ae{}ther calculate corresponding photon effective potential, unstable sphere radius, finally, induced angular size, which combined mass distance lead single prediction that quantifies shadow, namely diameter per unit $d$. Since $d_{M87*}$ observationally known from EHT Probe, we extract parameter regions order obtain consistency. find agree M87*, if \AE parameters are restricted within specific ranges, along an upper bound dimensionless spin $a$, verified by full scan space $1\sigma$-error.