how to downgrade from el capitan to snow leopard with sl installation dvd on imac 2011

thinking to upgrade sl 10.6.8 to el capitan on imac 2011.

i would like to know before upgrading if there is any safe mode to downgrade it again if I dont like el capitan. I have the original SL DVD´S shipped with the mac.


Has invited:

howapple - hello

Favor from:

Hello Eric.

The only problem is that the startup disk is not showing the new partition.

There is two items:

Macintosh HD

Network Starup

The new disc called Macintosh HD El Capitan is not on the list.


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