I'm running 10.8 on my MacPro 3,1 (8-core 2.8) with 32GB Ram, Intel X25-M 160GB SSD (esata), 4x2TB RAID1+1, ATI R6870 (flashed with EFI ROM). Absolutely no problems.
The system is actually more stable than it was running 10.7.4.
I think this is a ML issue as it's only started since the upgrade after 6 months plain sailing.
I have these 2-Port USB Cable KVM Switch Keyboard/mouse USB switchers for my Mac/PC setup (I'm using a 2008 Mac Pro).
Since the upgrade I'll be using the PC and try to switch back to the Mac. When I switch back the Mac won't send power to the mouse. If I directly connect it I get the same problem. To resolve I have to reboot
My advice do not load Mountain Lion on 2008 Mac Pros. You will be sorry - I was. I reinstalled 10.7
Dont bother with ML. I installed on my wife's macbook and its largely pointless unless you like dictation. Airplay on the computer is basically a useless toy.
Hm, why ? If you have old HDD as system disk, and 2600XT crap....you can not have them forever.
Rest of the 2008 system is still very powerful. With 5770 and SSD, it is just fantastic !
Don't be so loving of the 08 machine. I've just becomes very pee'd off with mine.
Remember they were hailed as USB 2.0, well they are not. We've just had to buy a new scanner the requires 2.0 and it doesn't work. Yet it works on the wife's MacBook Pro from 2009 - also USB 2.0. If you have a device that requires full USB 2.0 you are screwed.
I know it's that because we did a fresh install of Lion on both machines and just installed the scanner software. Works flawlessly on the wife's MAcBook Pro both in the independent software and through Photoshop CS5.5.
Was contemplating doing a ML upgrade this weekend, not a chance in hell now. Apple are not getting anymore money from us.
The Early '08 Mac Pros do indeed have USB 2.0. Don't spread misinformation.
I have a MacPro 3,1 with dual 2.8GHz Quad Core Xeon, 16GB RAM, ATI Radeon HD 5870 video, 256GB SSD boot drive, 2TB RAID 0 (2-disk) data disk. I upgraded from Lion to Mountain Lion on release day with no problems during the upgrade, or after (so far).
I use Time Machine to an external RAID connected to a dual eSATA PCIe card, have both bluetooth and USB mice and keyboards and bluetooth trackpad. All are working fine.
So ... no problems here so far ...
-howard
So I read there's a problem with 3,1's and 5870 in 10.7, where when the computer wakes from sleep, GPU performance drops to around half. On fresh boot performance is 100%. HFG and others in this situation, did you find this issue is resolved in 10.8?
The Early '08 Mac Pros do indeed have USB 2.0. Don't spread misinformation.
Have you tried a device the REQUIRES full USB 2.0 into a 08' Mac Pro?
Pastry, why does this pop up when plugging an iPod in to either of the front ports on my 08 Mac Pro then?
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Ha Ha. What does system profiler tell you on bus speed for all USB ports?
Pastry, why does this pop up when plugging an iPod in to either of the front ports on my 08 Mac Pro then?
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