Minecraft launcher crashes on opening

Launcher crashes immediately on opening, reinstalled Minecraft, updated Java.
Using a mac

my console shows this:

https://launchermeta.mojang.com/v1/products/launcher/022631aeac4a9addbce8e0503dce662152dc198d/mac-os.json
launcher(16484,0x7fff7497c000) malloc: *** mach_vm_map(size=7810759558480351232) failed (error code=3)

• • • error: can't allocate region
    • set a breakpoint in malloc_error_break to debug
      libc++abi.dylib: terminating with uncaught exception of type std::bad_alloc: std::bad_alloc
      Abort trap: 6
      logout
      Saving session...
      ...copying shared history...
      ...saving history...truncating history files...
      ...completed.