It used to be possible to upgrade the firmware of a Mac Pro 4.1
to 5.1. Nowadays when I try to open the firmware upgrade package .It tells me not supported on my computer. Is there anyway of overcoming this.
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Perhaps that you can manually download the file from this web page : https://support.apple.com/en-us/HT201518
这个答案有帮助吗？
No this is the same software I downloaded it won't open on my computer
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