Desktop blank window on macOS 12.7.6 Intel (Early 2015) — “initial render did not commit before reveal timeout”

macOS 12.7.6 (21H1320)
MacBook Pro (Retina, 13-inch, Early 2015)
2.7 GHz Dual-Core Intel Core i5
8 GB 1867 MHz DDR3
Intel Iris Graphics 6100
Buzz Desktop 0.5.3 (x64)

Launch output:
buzz-desktop: persisted identity pubkey 45daa4f9176652c91e87c6098672a4966989d8f6e166b83f720e463391a768ff
buzz-desktop: repos dir resolved at boot — no configured override, REPOS is the default real dir
buzz-desktop: media proxy listening on 127.0.0.1:59171
buzz-desktop: initial render did not commit before reveal timeout

Window opens full-screen dark/blank with zero interactivity. Same behaviour as #3295 but on Intel instead of arm64.