
ChecktheDeviceCompatibility·RestarttheMac·ResettheMacNVRAM·ResolveDateandTimeIssues·InstallmacOSinSafeMode·TrythemacOS ...,Fix'Anerroroccurredpreparingtheupdate'whenupdatingmacOSSequoiaorearlier·RestartyourMac·Checktheinternetconnection·Freeup .....
If an error occurred while updating or installing macOS
Checkstoragespace·Checkyourinternetconnection·InstallfrommacOSRecovery·Repairyourstartupdisk·ReviveorrestoreMacfirmware.
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