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Abstract: We present a scheme to generate the macroscopic Gaussian cluster states of multiple ferrimagnetic spheres in a microwave cavity through Kerr interactions. When each such sphere with self-Kerr nonlinearity is coupled to a single-cavity mode, it allows the generation of multimode entanglement and graph states—an important resource for one-way quantum computing through measurement-based protocols—near the strong and in the weak coupling regimes. While optimizing such states over the parameters governing the dynamics, the optimal appears for a far-detuned as well as dissipative cavity. Cluster states for a linear and a ring topology of a few spheres are discussed in the steady state of the system, further applicable to multiple spheres ( n = 10 ) , for experimentally feasible parameters.