I solved it by setting the mtu to 1450. For two months I was unable to download the update as soon as the mtu was set, the update was successful.
biadesivo
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I solved it by setting the mtu to 1450. For two months I was unable to download the update as soon as the mtu was set, the update was successful.
I have the same problem with my iMac 5k 2017, I try all commands show here but nothing.