For some models, or OK button while plugging in. 5. Flashing Monitor the front LED light. A blinking LED indicates the update is in progress. 6. Cleanup Remove the USB after the TV restarts.
A flat package is essentially an xar archive (eXtensible ARchive format) containing a Bom file (Bill of Materials), a PackageInfo manifest, compressed payloads (often gz or zstd ), and optional resources or scripts. upgrade-loader.pkg
In the meantime, here is a for a report on upgrade-loader.pkg (macOS installer package): For some models, or OK button while plugging in
