Dual monitors

[PlayingThePart]

Not sure if this can be done but if it is possible let me know, or let me know the best solution you can think of...

I've got a mid 2007 iMac, 250 GB, but was working flawlessly running 10.6.8. However, I bought the new iPhone 6s and of course that requires the new iTunes, which requires 10.8 or higher. So I bit the bullet, after holding out for 4+ years I finally updated my OS. Terrible life decision. I just don't think the guts of the computer are fast enough to be running El Cap. It's painfully slow compared to when I was running 10.6.8.

So, I thought about picking up a second Mac, something a little newer, little more beefed up when it comes to hardware. Something that won't struggle as much running 10.11 and then running 10.6.8 off my older computer. Snow Leopard is still my favorite OS, just works well for me.

My question or issue- I'd love to run dual screens. Is it possible to do so with two different OS running? Basically I want the familiarity of SL but the up-to-dateness of El Cap, and the capability of actually hooking up my iPhone. Appreciate any advice

 

[Coldmode]

Stop using Snow Leopard. It hasn't had a security update in 4 years.

 

[Garsun]

This probably doesn't answer your question but as I recall either VMware or parallels allows you to Run older OS X is as a virtual machine. Maybe you could reverse that and run the newer OS as a virtual machine on a an older Mac OS and then be able to use a dual screen Mac.
I'm just thinking outside the box and I don't really get what your question was but what the heck

 

[iemcj]

I know it doesn't give you a straight answer but things really aren't that different from the user side. There's nothing you could do then that you can't do now, it's not like going from windows xp to windows 8 (and wanting to light your computer on fire). A lot of the zanny features that are shown on the websites aren't things you need to use, notifications bug the crap out of me when I'm working so I have most of it disabled, I'd bet sitting down at my computer wouldn't feel that different than SL (except for icons pictures and stuff haha)

 

[PlayingThePart]

I probably wouldn't mind El Captain if I had a faster, more up to date computer. But I don't, nor do I need one. What I have works, or worked, with SL. El Captain seems to be a good OS, but there were things I loved about SL, things I had gotten used to (spaces to be specific.) If I have to run EC, I will, just not the preferred OS to use.

I realize my question may have been slightly confusing; to put it in the simplest way I can think of- is there a way to run two different OS on two separate computers, connected by a DVI or VGA adaptor, that run off the same keyboard and trackpad or mouse?

 

[MacUser2525]

I realize my question may have been slightly confusing; to put it in the simplest way I can think of- is there a way to run two different OS on two separate computers, connected by a DVI or VGA adaptor, that run off the same keyboard and trackpad or mouse?

You want KVM switch only do not bother connecting up the video portion. This will allow you to use the same keyboard and mouse with both machines by simply pushing the button to switch the keyboard and mouse output to the machine you want to use at the time. Another option is to just use the screen sharing built in to OS X to use only the hardware you have on hand now. This allows you complete control of the machine you are sharing through its window when opened and focused on it.