I've Macbook pro erly 2011 and i've two adapter mdp to hdmi, one moshi and one sqp, all two not work,
I brought my mac in three centers approved in a apple store, but was not detected anyhardware problem, before I had already triedtwo other adapters, but no one has ever worked with the graphics card amd 6490m. someone managed to use the adapter on amacbook pro 8.2 with this configuration:
MacBook Pro
Identificatore modello:
Nome modello: MacBook Pro
Identificatore modello: MacBookPro8,2
Nome processore: Intel Core i7
Velocità processore: 2 GHz
Numero di processori: 1
Numero totale di Core: 4
Cache L2 (per Core): 256 KB
Cache L3: 6 MB
Memoria: 4 GB
Versione Boot ROM: MBP81.0047.B27
Version SMC (sistema): 1.69f3
grafic card
Modello Chipset: AMD Radeon HD 6490M
Tipo: GPU
Bus: PCIe
Larghezza Lane PCIe: x8
VRAM (totale): 256 MB
Fornitore: ATI (0x1002)
ID dispositivo: 0x6760
ID revisione: 0x0000
Revisione ROM: 113-C0170H-521
Versione gMux: 1.9.23
Versione driver EFI: 01.00.521
Modello Chipset: Intel HD Graphics 3000
Tipo: GPU
Bus: Integrato
VRAM (totale): 384 MB
Fornitore: Intel (0x8086)
ID dispositivo: 0x0116
ID revisione: 0x0009
Versione gMux: 1.9.23
Monitor:
Color LCD:
Risoluzione: 1680 x 1050
Profondità pixel: Colore 32 bit (ARGB8888)
Monitor principale: Sì
Mirror: Spento
Online: Sì
Integrato: Sì
I tried all combinations, with a power cord plugged in, starting with onlyboard amd, intel sole use of the graphics card viagfxcardstatus, no result on the screen is still no signal, for additional information I connect a LEDcinema display and it works,vga adapter and it works, the last test Iperformed was with a Minidisplay port to dvi to hdmi no signal but same result. I also made pram reset smc removed and put back the ram the same result. I hope someone has solved this problem, if someone hasthe same problem I could write to apple for a check on these models ofMacBook with 6490m graphics card amd. thanks for the help theygive me. Again, no technician is able to understand why not working any type of adapter hdmi