El Capitan - avoid, broke my 2013 Macbook Pro..

[aldrinjtauro]

When you say the Alt key for network boot failed to work, what do you mean? Internet Recovery uses Cmd + Shift + R, and you hold it down before you hit the power button (to be safe). That works even if your drive is wiped, since it boots from the firmware and not the disk.

 

[pat500000]

IMO, there are an infinite number of possible conditions a device can be in (both software and hardware wise) before an update.

Both Microsoft and Apple seem to realize that, and the correlating fact that their QA people can't recreate every set of conditions, so both companies have started to utilize public beta testing, where tens of thousands of additional people act as QA folks to further test the OS before it's released to everyone.

And even then with all that, not all issues get identified.

So throwing more QA at it before launch reduces the number of issues, but still doesn't eliminate them all.

But it does reduce the problems.

 

[pat500000]

And yet it was SL what had probably the most devastating upgrade bug in the history of OS X (the one that would delete users data). The point is, it is not possible to test it fully, because there are too many possible configurations outside of Apple's control. What can remedy the situation somehow is having a strict set of enforced rules, and that's exactly what Apple is trying to do. For instance, only allowing signed drivers, preventing applications from writing to system locations, properly isolating the applications from each other — all these things make it easier to carry out an upgrade in a systematic way.

you mean SL up to 10.6.8?

 

[leman]

you mean SL up to 10.6.8?

I mean 10.5 to 10.6

 

[pat500000]

I mean 10.5 to 10.6

I don't know about..but life was great till 10.6.8.