The famous blue screen freeze

after leaving imac desktop running on night while
traktor scratch pro 2 running full analyse
of music collection bpm detection etc
woke find mac froze on lightish blue screen
couldn't access other boot down imac ,
after rebooting i've been stuck on blue apple loading
screen hours .

i've tried power off / power cable out / power button /
power cable in / reboot trick ,
didn't work .

tried load using command , v ,

running disk utilities / repairs

trying @ present boot in safe mode
keeps going blue screen apple
logo black screen reboot sound
blue apple logo screen seems
stuck in loop .

i've read loads of threads , nothing has helped far

i'm getting tired , fed apples useless called
support !! i've had famous black screen of death caused
faulty graphics cards happen macbook pro twice , ,
quoted silly prices fix . after paying first time
refuse pay again macbook sits broken .

have dodgy time machine 2tb thas stuck on orange light
seems maybe fixable totally whipping
restoring losing around 1.2tb of music never .

lost 85gb first macbook failure ,
56gb on second failure .
have around 123gb of
music on imac i'm determined not lose .
i'm dj music me ad work .
music last gb have left losing
end career speak .

i'm @ wits end how solve imac blue screen problem
after spending on £4000 on apple products fixes
i'm done giving apple anymore money .
there customer support crap beyond belief .

hope out there can me solve
problem , not lose faith in apple alltogether

 

do have access other mac, own or friend's one?
way, can further troubleshooting , backup music , other important data, if time capsule (?) broken.

, if music paid life, should better backup strategy.

instance, digital , analog (scanned) photos reside on 500 gb hdd, personal video footage resides on 500 gb hdd.
both hdds backed 1 tb hdd via carboncopycloner.
1 tb hdd gets backed 1 tb hdd via ccc.

, have kind of bootable system, clone mac os x volumes (in 2007 imac on ssd , in 2009 mbp on ssd) external hdds, can run mac os x in case breaks down.

 

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