Four new engines for the M1 and two three updates:

Binary: berserk-4.1.0 (new)
Source: https://github.com/jhonnold/berserk/releases/tag/4.1.0

Binary: Clover-2.1.3 (new)
Source: https://github.com/lucametehau/CloverEngine/tree/v2.1.3
Binary: Clover-2.2 (update)
Source: https://github.com/lucametehau/CloverEngine/releases/tag/v2.2

Binary: mayhem-4.2 (update)
Source: https://github.com/SamuraiDangyo/mayhem/releases/tag/v4.2
Net: nn-cb80fb9393af.nnue
Book: performance.bin

Binary: RubiChess-2.2-dev (update)
Source: https://github.com/Matthies/RubiChess
Net: nn-673bf01913-20210421.nnue

Binary: seer-2.0.1 (new)
Source: https://github.com/connormcmonigle/seer-nnue/tree/v2.0.1

Binary: stockfish-mojo-1.5 (new)
Source: https://github.com/joergoster/Stockfish/releases/tag/v1.5
Net: nn-62ef826d1a6d.nnue (or any other net from https://tests.stockfishchess.org/nns)