won't boot

Hi, I am not an electronics' specialist. A week ago I replaced the battery in my old but perfectly working MB Pro. This was its second battery change since purchase. The new battery was aftermarket but listed as "original"! After connecting the charger, the LED on the Magsafe lit up green...

When trying to turn on my G5, the power button will light up but immediately goes out after I stop pressing it. The fans come on but no boot chime and nothing on the monitor. The fans speed up to full speed after about a minute. The air blowing out of the machine is room temperature and never...

Hi all, I have a music recording project coming up that looked like a good excuse to resurrect my 2006 Mac Pro 1,1 ... In preparation, I upgraded to Snow Leopard 10.6.8 on a Sandisk 512Gb SSD and flashed the EFI to 2,1 .. all works fine. The new (used) processors arrived, well packaged and...

Hey, so recently I decided to upgrade the EFI of my Mac Pro 1,1 to go to a 2,1 (netkas method) and the EFI & SMC upgrade was successful. I also enabled AHCI for Windows via OS X Utilities. Everything went well, OS X and Windows booted flawlessly until I tried OC the Front Bus like my friend did...

Hi, i'm in trouble! My imac takes forever to boot. I started holding cmnd + r and use disk utility to run first aids but it can't solve the issue. Now i need to back up all my files and later restore to 0 my hard drive, this is what i undestand so far. (Sorry for my bad english) does anybody...

All, I've recently hit a dead-end diagnosing what has happened to my MP 2,1. For the past 2-years all has been running well on 10.11.6 via the boot.efi hack and an EVGA 560 GPU; however, last week (after some power outages) my mac was non-responsive. Pressing the power button does spin up the...

2010 Mac Pro 5,1 2x 2.93ghz Westmere 20gb RAM OWC 256gb SSD ATI Radeon 5780 The last time this system booted (at all) was just before I took out the GPU to try in another Mac Pro. Once I reinstalled the GPU: - system starts up - front power button light illuminates - all fans run - gpu...

Hey! So I recently got a PowerMac G5 and when I first booted it, just the fans where spinning but nothing else. I thought I could solve that problem later and decided to clean the Mac up, since there was dust everywhere. After I did that, I wanted to turn it on again. But nothing happened. When...

Hello, Background: I'm the proud and despondent owner of a Macbook Air that's apparently died after I forgot it on the garden table for the time it took to be rained on... The machine won't boot, won't talk to me when I ask for forgiveness either-- sadly, I think she's done. Machine: All I...

About 9 months ago I flashed my 2009 8-Core 2.66 GHz Mac Pro to 5,1 firmware and upgraded the processors to x5680s which I bought on eBay and de-lidded. I've been running Sierra 10.12.6. Things were fine until a few weeks ago, when the following symptoms started happening erratically: 1...

I have a older mid 2009 that wont fully boot up. I have tried all the startup shortcut keys and none of them do anything exept for option and command-s. As far as I can tell its hd is corrupted, but I can’t get to the utilities to fix it. Any ideas?

So about two years ago I was playing a graphically intensive video game on my Mac Pro 4,1 computer. I was becoming slightly alarmed as I noticed the fans had automatically sped up to cool down the processor, it was getting very noisy. Then suddenly the display just went black. The processor was...

Hi guys, I have a friend with a PowerBook G4 15" / PowerBook5,8, PowerPC G4 (1.5), 1.67Ghz. It's obviously old, but was refurbed 3 years ago and has functioned well for their needs, but I understand the battery has been terrible for a year - holding only seconds of charge and requiring the AC...

Hey everyone, so I purchased a 2009 4,1 Mac Pro (Dual x5550) on Craigslist a couple weeks ago for $150. Honestly insane deal for how good of condition it's in. I painlessly flashed it to a 5,1, installed High Sierra, upgraded to 32gb of RAM, and installed a GTX 1070. I've had absolutely no...

Hi, First, I've been a somewhat technically proficient Mac user since 1984 but this has me really stuck. I recently bought a pair of Seagate 8TB drives to use as primary and backup of project volumes. I also created separate partitions for Yosemite, El Cap, and my current Sierra system. I...

So my MBP (late 2009) has started to show the flashing folder with a question mark in it. I've tried CMD + R , Option, Option + D, and Shift all on startup and all of these keys or key combinations dont do anything. When I press option to boot from a USB with El Captain on it to re install OS X...

20' imac after dissemble replaced DVD drive now wheel stops spinning after a few seconds after chime sounds then wheel freezes. Does not continue to boot. Stuck! Ugh.... plugged everything back in order (at least I thought) what would make wheel stop spinning? I figured it must be the new DVD...

Please Help. I got a mac mini 2006 1.66 Ghz core duo with 2 GB of ram for 50 dollars. So I did a clean installation of snow leopard and upgraded it to 10.6.8. Then I tried to use boot camp 3.0.4 to install windows 7 32 bit in another partition. Boot camp could divide the hard disk smoothly...

Hi I have followed a post on the forum for this website that shows you how to install Yosemite on unsupported mac. I have followed all instructions carefully but when I finally try to boot off of the installer drive it simply boots straight back to Lion. I have tried to bless the USB drive too...

Hello, A few weeks ago my computer froze while I was using it so i performed a hard reset, after which the computer would not boot. I performed every troubleshoot I found online and got it to boot once successfully in single user mode but after about 20 minutes, my screen did a weird thing...