Installing Mac OSX in a second partition

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Hi.
I have Mac osx 10.6.7 in my MacBook Air. If I create a partition, can I install Mac OS in that partition and boot from that instead of the existing one?
 
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2019 iMac 27"; 2020 M1 MacBook Air; macOS up-to-date... always.
Hi.
I have Mac osx 10.6.7 in my MacBook Air. If I create a partition, can I install Mac OS in that partition and boot from that instead of the existing one?

Yes. If your drive is fragmented, you may need to compact it first to get enough contiguous space. If you have a spare drive, a quick dirty way is to use SuperDuper to clone your drive to that, then clone it back. Otherwise, use iDefrag to do a proper defrag, though you should always have a backup just in case.
 
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good. I installed the MacLeopard system in a new partition, but I am blocked in "creating an account" procedure. the "continue" button is not enabled with my choice of pwd and username and I cant go on. is it any particular rule for passwords?
 

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15" MBP '06 2.33 C2D 4GB 10.7; 13" MBA '14 1.8 i7 8GB 10.11; 21" iMac '13 2.9 i5 8GB 10.11; 6S
If you're attempting to install a version of OS X older than the machine shipped with, it's unlikely that you will get a complete installation, much less get it to work. It would not have the drivers required for your new computer.
 

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