Flashing 4,1 to 5,1 any issue with Sierra?

Luba

macrumors 65816
Original poster
Apr 22, 2009
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I have a 4,1 but haven't flashed to 5,1 mainly because everything I have is stock (except the RAM which is 1333 and meant to work with 5,1) and don't plan on upgrading CPU, etc.

How is your 5,1 (previously 4,1) running macOS Sierra? I like to run Sierra, but it's not a "big deal" upgrade to me and I'm happy with El Capitan. I'm worried about possibly bricking my Mac Pro because I didn't flash it correctly. Btw, any danger of introducing vulnerabilities or malware by flashing?

I'm also thinking of not flashing and getting the new iMac that's supposed to arrive sometime this year. But then what do I do with my 4,1 which is still running fine.
 

h9826790

macrumors G5
Apr 3, 2014
12,773
5,581
Hong Kong
So far, no one in the forum manage to brick / damage a 4,1 by flashing it to 5,1 (even with plenty of failure case). The worst case is just unable to upgrade, but keep use it as a 4,1.

I think unless you intentionally do something crazy like pull the power cable during half way between the flashing process, it's a very very safe process (even though you didn't follow the exact procedure and eventually fail to upgrade).
 

Luba

macrumors 65816
Original poster
Apr 22, 2009
1,206
174
So far, no one in the forum manage to brick / damage a 4,1 by flashing it to 5,1 (even with plenty of failure case). The worst case is just unable to upgrade, but keep use it as a 4,1.

I think unless you intentionally do something crazy like pull the power cable during half way between the flashing process, it's a very very safe process (even though you didn't follow the exact procedure and eventually fail to upgrade).
Good news! How is it using macOS Sierra?
[doublepost=1475288193][/doublepost]I have the optional WiFi card that Apple offered when I purchased my 4,1 in 2009. So no problem with that WiFi card working with Sierra?
 

h9826790

macrumors G5
Apr 3, 2014
12,773
5,581
Hong Kong
Good news! How is it using macOS Sierra?
[doublepost=1475288193][/doublepost]I have the optional WiFi card that Apple offered when I purchased my 4,1 in 2009. So no problem with that WiFi card working with Sierra?
Which card? system info can check it.
 

Luba

macrumors 65816
Original poster
Apr 22, 2009
1,206
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Which card? system info can check it.
Card Type = AirPort Extreme (0x14E4, 0x8E)
Firmware Version = Broadcom BCM43xx 1.0 (5.106.98.100.24)
 
Last edited:

FireBlade93RR

macrumors newbie
Dec 12, 2013
5
0
installed Sierra on mine (2x6core 3.46)
so far i have not seen any issues, i did do a clean install on a different drive

i regularly play WoW on it, with a GTX980TI
 

Luba

macrumors 65816
Original poster
Apr 22, 2009
1,206
174
installed Sierra on mine (2x6core 3.46)
so far i have not seen any issues, i did do a clean install on a different drive

i regularly play WoW on it, with a GTX980TI
Is it as easy as a YouTube video showed? I'll probably flash to 5,1 when Sierra has its next update.