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Until someone can point to benchmark comparisons of two identical macs being upgraded in different ways (clean install vs. upgrade) that show an appreciable performance increase after doing a clean install, I'll save my time and just do the upgrade.

But what do I know? I'm just a punk who makes decisions based on rationality and time value.
 
I prefer to do a clean install of major new releases. Don't really know why. Seems to be a good opportunity to get rid of software I no longer use - bit of housekeeping.
 
since TM backs up my Apps, can i fresh install an TM my apps back on?

I don't feel like reading the rest of the thread, so here goes.

I would only do that for the single-component apps, i.e. the ones you drag right into the Applications folder.

The other ones, like iWork or iLife, which have many components in many places, I would just install from the CD.
 
I'd much rather just upgrade, but knowing me I'll most probably wipe it clean and spend the next 3 hours of my life frantically trying to get my machine back up to speed. I love the new Mac smell. Even though its in my head... :p
 
I've used Time Machine to "restore" for several new computers and never had a problem.

Is there a difference between doing a clean install and then restoring EVERYTHING from TM and just doing an upgrade? Does this keep all the "junk" you're trying to get rid of with a clean install?
 
OP - Can you add a poll? Might be useful to summarise the thread in terms of numbers upgrading vs wiping
 
I'll be doing a clean install, I need to do one anyway so I'm waiting for SL to do it.
 
I definitely will be doing a simple upgrade. Apple Store recently reformatted my HD :)'() and getting everything set up again was a HUGE pain.
 
if the weather is bad and my GF is traveling then I'll invest a weekend and do a fresh install of everything. will take certainly a full day. but i get rid of many useless apps I never use. also I will clean out my home folder from useless old data files.

if the weather is good i'll do a upgrade and be done in 30 min.
 
Can someone elaborate on a clean install vs. a TM backup. What's the difference in the process/results/time consumption? Thanks.
 
I've used Time Machine to "restore" for several new computers and never had a problem.

Is there a difference between doing a clean install and then restoring EVERYTHING from TM and just doing an upgrade? Does this keep all the "junk" you're trying to get rid of with a clean install?

Yes, what you'd be doing is similar to an archive and install. In those situations, you have a fresh copy and then your stuff is simply moved in. When you upgrade-in-place, you run the risk of a file not getting replaced properly and screwing something up, or some hack you had installed not working with Snow Leopard (maybe it was done without your knowledge by some program you installed, like Logitech Control Center). It's safer to get a clean copy down first, then just bring over what you need. You can do this by doing an Archive and Install, or by doing an Erase and Install, then using TM to get your stuff back. (P.S. Migration Assistant can do the work of getting your stuff back in from the TM backup for you)
 
I will do a complete wipe and start over again. It will be a good time to get rid of old crap such as unused apps and old and forgotten system files (like application support for apps i deleted a year ago), plus i need my Bootcamp partition to be about 50 GB larger and with Win 7 around the corner it seem like a good time to wipe it all.
 
I think I'm going to clone my hard drive, then do erase-and-install.

Starting out with a fresh OS with a fresh hard drive, will give me a chance to pick and choose what stuff I want to bring over from my backup, allowing me to clean up my drive and get rid of the old stuff.
 
I will be upgrading. I don't have like 3 of the serials 3 of my programs require. Also, so far, every OS X update has flawless for me, so I have reasons to trust Apple OS X 10.6 will be fine to update.

As a precaution though, I will be performing daily back-ups in the days prior to OS X 10.6's installation.
 
I want to do a clean or Archive & Install but the pre-pricing is is just for an Upgrade Disk. So far the Full version is only offered with iWork and iLife. Where is the separate Full version only Apple?
 
For $9.95, I'll just upgrade

I picked up iLife and iWork '09 a month ago and the machine was scrubbed and installed by techs when I bought it, so I'm going to throw SL on top of everything. I haven't owned it long enough to do any real damage. :eek:

Cheers!
 
Until someone can point to benchmark comparisons of two identical macs being upgraded in different ways (clean install vs. upgrade) that show an appreciable performance increase after doing a clean install, I'll save my time and just do the upgrade.

But what do I know? I'm just a punk who makes decisions based on rationality and time value.

Agreed. From what I've learned, it seems to be largely a psychological thing, doing a wipe and install. I can understand how that'd feel - it's metaphorically like moving into a new house instead of renovating and refurbishing your old one. If one wants that feeling, go for it!

Then again, there -could- be some technical benefits to it. So who knows. That's why I love what you suggested - somebody drawing up a benchmark chart or some kind of actual empirical evidence-based report would be great.
 
Doing a clean install would defrag the disk and get rid of all unnecessary files. IMO, it's worth it.

If I'm feeling up to it, I'll do an upgrade and then a clean install, with benchmarks for both.
 
i did an upgrade from tiger to leopard, and I'm just going to do a clean install this time.

I got to much garbage lying around in the system, and all my stuff is external besides my aperture library and some apps, which I'll probably use a time machine backup for.

I'm just not looking forward to re-installing final cut studio, but it'll be worth it
 
Since Snow Leopard is $29 for Leopard users, will it check your hard drive for Leopard before installing?

Good question. If you're upgrading from Tiger, it's $129. So does that mean two different installer discs? I can't imagine the installer.app would be the only difference if sold at two different prices. Does the $129 version include stuff that would already be on your Mac from Leopard? Of course you could just go into the Apple Store and pick up the upgrade from Leopard version for $29. But perhaps this is for an upgrade, only. Maybe the $129 version is for the clean install.

Can anyone confirm/deny?
 
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