There are specs defined to interface applications with the system .
Developers are supposed to take care of them but Apple can't check if every developer apply correctly the specs.
I remember a system update which had severe consequences because some third parties dropped one of the specs because from their point of view it was usless.
Alas, in the updater, Apple used it. A lot of customers lose datas and the builders had to revise their Firewire bridge.
Since this incident, I disconnect every external device during the installation of an update. It's one of the reasons why I never apply an update thru Software update.
I download the updaters and when I have no need fopr the devices, I disconnect them and apply the updaters.
This is also why I install the new systems on freshly formatted HDs.
Eveybody is free to play with matches but don't be surprised if you burn your fingers.
After installing a clean new operating system, it's time to install third party extraneous tools to chek if they are perfectly compatible. Inserting a single new component at a time give the ability to identify easily a possible wrongdoer.
If you apply the upgrade on a system with several exotic extensions, it's very difficult to guess which is wrong.
Good practice is to wait one or two months after the delivery of a new OS before installing it. This way we have feedback from the reckless users unable to wait one hour after the delivery.
My old ape's experience tought me that betatester miss a lot of odddities because they don't test every third party products.
Developer aren't more serious.
I'm not an user of Adobe products but a few weeks before Lion's delivery, I warned a forum dedicated to inDesign that 5 or 6 AppleScripts embedded in the CS suite were compiled for PowerPC machines urging users to open them and recompile them by themselves before buying Lion. If things were behaving the correct way, it's Adobe which would have posted the updated scripts.
In fact, I had installed the late CS suite trial for see and when I ran a script scanning my machine to identify PowerPC only apps, the Adobe scripts were brought to the surface.
Yvan KOENIG (VALLAURIS, France) dimanche 18 septembre 2011 21:25:19
iMac 21”5, i7, 2.8 GHz, 4 Gbytes, 1 Tbytes, mac OS X 10.6.8 and 10.7.0
My iDisk is : <http://public.me.com/koenigyvan>
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