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mojave usb installer

  1. T

    iMac no longer recognizes USB installer

    Hi folks, my 2019 5K iMac (which came with Mojave from factory) doesn't recognize when booting (with alt key pressed to access the boot options) a USB installer of Mojave and backwards (El Capitan etc), they literally don't show up when boot options appear. Funny thing is, it ONLY recognizes a...
    • torbarr
    • Thread
    • boot firmware imac mojave usb installer
    • Replies: 2
    • Forum: iMac
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