Anderson localization is an emergent phenomenon for both quantum and classical waves, despite extensive studies over the past 40 years, it has remained elusive in three dimensional electromagnetic fields. The high-frequency localization for Maxwell eigenfunctions in a three-dimensional ball is investigated in this talk. Vector spherical harmonics are employed to reduce the original problem to two infinite systems of second-order ordinary differential equations, corresponding to the transverse electric (TE) and transverse magnetic (TM) modes. Using the asymptotic properties of Bessel functions together with spherical harmonics, we prove the localization for Maxwell eigenfunctions of TE and TM modes. Specifically, when the spherical frequency $n$ and the radial frequency $k$ go infinity simultaneously with a ratio limit $n/k $ approaches $\omega$, we show that the Maxwell eigenfunctions concentrate around a spherical shell, whose radius grows proportionally to the ratio $n/k$ . Moreover, we show that as $n \to \infty$ with $k$ fixed, or as $k \to \infty$ with $n$ fixed, the eigenfunctions exhibit whispering gallery modes or focusing modes, respectively.