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Released June 2009 / 2.66, 2.8, or 3.06 GHz Core 2 Duo Processor

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Installing 3 Operating Systems on my old MacBook Pro


I am trying to install a copy of Windows 10 Pro I’ve purchased on my old MacBook Pro. However, I am currently using a patched version of Catalina and because of this I cannot boot into recovery mode and enable my computer to boot from my USB drive.

In a perfect world I would be able to run my Patched version of Catalina and Windows 10 only. Is there any way to “Allow booting from external media” without going into recovery?

At this point in my research I’m near concluding that I will have to install El Capitan (the latest OS my mac can handle) and partition the drive from there. If this is the case I am wondering if it is possible, and how, to run the native El Capitan, The patched Catalina, and Windows 10 off the same SSD. Let me know if you have any insight.

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You do realize that Catalina ONLY uses 64 bit applications?


Is this just a condemnation of the capabilities of Catalina or does this affect me trying to install windows in some way?


Keep in mind you've forced an older system to run something that was not tested by Apple at all and the hardware its self has limitations due to its architecture. Then you are expecting this already delicate config to go one step beyond trying to run Windows and I assume Linux.

Then we still have the issues of running a new OS (Catalina). Most of us have not installed it on supported systems and there are some issues running Windows that's just coming to light.

I would back off to Sierra (HFS+) and run BootCamp from it if Windows is important


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Are you are aware of using the Option key to get to the Startup manager? Mac startup key combinations

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I am, it displays the startup disks available.


It does allow you to jump between different OS if they are setup correctly.


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