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Booting Snow Leopard on El Capitan Disk
Topic Started: Jan 30 2018, 09:19 AM (5 Views)
victorgrant

Hello all,

I’m running El Capitan OS X 10.11.6 on an early 2009 20” iMac with 2.66GHz processor and 8GB RAM. This OS requires SIP to be enabled and I have discovered that the status of SIP is stored in the MVRAM of the computer so that whatever disk it is booted from benefits from this protection. The original OS for this computer in 2009 was Snow Leopard OS X 10.5.6 and i would like to boot the iMac from an external disk with the old OS so that I can use some legacy software which won’t run in El Capitan. I tried some time ago to boot from the old OS and had some difficulty getting the iMac back on song afterwards: my query is should I disable SIP from the recovery partition before attempting to boot from Snow Leopard? Should I experience any problems with booting from Snow Leopard occasionally?


Thank you

I did not find the right solution from the internet
References :

https://www.techadvisor.co.uk/forum/apple-help-34/booting-snow-leopard-el-capitan-disk-4606841/


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