Salta al contenuto principale

Modello inizio 2011, A1278 / processore i5 2,3 GHz o i7 2,7 GHz

784 Domande Visualizza tutte

Update sierra with no battery, only ac adapter.

So I just formatted my mac OS version 10.7.5.Downloaded sierra and launched it. Computer restarts and everything goes smoothly until.... "your computer is not connected to a power source ".

My ac adapter is attached but I have no battery installed, I intend to buy a new one soon enough but, I need to work in the mean time so.... Anyone could help me out?

Risposto! Visualizza la risposta Anch'io ho questo problema

Questa è una buona domanda?

Punteggio 3
Aggiungi un commento

2 Risposte

Soluzione Prescelta

Hello barrosvictor25,

Reset the SMC and try again with lovely sierra!

Questa risposta è stata utile?

Punteggio 2

4 Commenti:

Hi it almost worked.... Now it says the installer payload failed signature check. :( what does thateven mean?


Hi again! So it appears that my date and time were wrong after smc reset. So i corrected it and the update is going normally. Thanks for the answer, peace!


You are welcome! :-) enjoy new OS,


Hi Barros, did u ever get your Macbook Pro Sierra back to full clock speed? thanks!


Aggiungi un commento

Did all suggested including date reset via Terminal but obstinately refuses to install Sierra :-(

Questa risposta è stata utile?

Punteggio 0
Aggiungi un commento

Aggiungi la tua risposta

barrosvictor25 sarà eternamente grato.
Visualizza Statistiche:

Ultime 24 Ore: 0

Ultimi 7 Giorni: 2

Ultimi 30 Giorni: 4

Tutti i Tempi: 5,382