mac pro early 2009

Hello. I have a MAC PRO (Early 2009) that is running OS 10.11 and I had this computer since 2009 and has been running great ever since. But I just noticed it started to freeze up. The screen would freeze. I could still move the mouse around but I couldn't click on anything and the keyboard...

Hi guys, I run/own a commercial recording studio and our main control room has been centered around my early 2009 Mac Pro since I purchased it new (can you believe it still rocks!) At any rate, I upgraded the control room's main monitor to an ultra HD monitor and I will be needing to upgrade...

I am currently upgrading an early 2012 to 6 Core CPUs (washer stack method) and I have experienced some oddities: It does boot, but it shows a red diagnosis LED/ red lamp next to the front (when having the tray inserted) CPU. However, in system profiler it shows slots 1 and 2 as empty (which...

As I found out when I went to download Sierra, my Mac Pro has been dropped from the list of Macs that will run Sierra. I have read here in the various forums that the Mac Pro can be "Flashed" with a newer software. As far as I can tell my Mac Pro is also known as a 4,1 and I guess it can be...

Hello, I have a early 2009 Mac Pro 4,1. Out of no where while using it just shut it off completely and when I went to go reboot it, everything sounded fine except that I didn't hear the start up chime and my display remained inactive. The light above the power button stays solid and when I...