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Q: Mac pro 4,1 2009 every OS but the Snow Leopard takes 6gb of RAM just on boot? Yosemite unusable

I have a 2009 Mac Pro quad 2.66 ghz with original 12gb of ram(an option at time of pruchace, but I also have different modules for 6gb from another machine of the same series, problem is not related to the RAM modules). I also have multiple hard drives and tried installing everything from Lion onwards to any of those (even having a single drive in the system), and the problem presists.

 

The issue:

When I boot up Snow Leopard system takes around 1.5-2gb of ram and that is perfectly fine. Everything works great.

When I boot up Lion, Mountain Lion, Mavericks, Yosemite, the system itself takes 6gb of RAM or more just too boot. This can't be right, how would any newer Mac even work with their 4gb.

I noticed that in Activity monitor system automatically opens a ton of apps that have no use on my system like WiFi(that I don't have). Seems like it automatically boots every single app that is part of the system, it takes it like 30 minutes to load all those useless features, and system is crawling then, works ok 30 minutes in but I have half my ram wasted.

 

How do I stop it from doing this? Everything is fine with Snow Leopard, but I am stuck in it, and I can't purchase a lot of apps that I would if I could actually use newer software?

Mac Pro

Posted on Apr 3, 2015 10:29 AM

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Q: Mac pro 4,1 2009 every OS but the Snow Leopard takes 6gb of RAM just on boot? Yosemite unusable

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