Can’t download software
The prepare software update function doesn’t work
MacBook Pro 16″, macOS 15.5
The prepare software update function doesn’t work
MacBook Pro 16″, macOS 15.5
You post lacks relevant information that is needed to offer accurate assistance.
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The prepare process is automatic after the update is downloaded.
Prepare function fails after starting
If you Mac doesn't startup, see > If your Mac doesn't start up all the way - Apple Support
Can’t download software