As of the writing of this FAQ (Frequently answered question page), I've updated every Mac OS X version on an Intel Mac through 10.4.11 to 10.11 using the method of this FAQ.
I have a Power PC Mac right now standing at 10.4.8, which I could upgrade to 10.4.11, except I have some old games which won't run on 10.4.11.
Perhaps the biggest requirement for many users will be having at least 8GB free on the Mac, which can sometimes be cut fairly close with the smaller SSD-based Macs.
Omni Disk Sweeper is a great tool to help free up available hard drive space, helping you track down what’s eating up drive space – it’s also a free download from here.
Or a Maps location into an invitation to get your party started. Paste the ingredients right to the grocery list on your i Phone.