Should I do any "maintenance" before upgrading to Snow Leopard?

Are there any simple things I should do before doing a direct upgrade to Snow Leopard? I have gone through and deleted a ton of files that I don't need, but that's not the maintenance I mean. Should I do a disk repair, clear cache, etc? Anything?

I verified the disk, but it's fine. I also did a permissions repair.
For backups I've used Time Machine (to a 500gb external). I know it's not the best solution, but I like it. It's been working fine since Leopard came out, and I have done one restore from it.
Actually, just tonight I've been experiencing a lot of beachballing, I'm not sure what's causing that. One thing I should point out is that I recently installed some new ram, and I've heard that can occasionally cause issues (but I doubt it's the problem).

Similar Messages

Hi, I am interested in upgrading to snow leopard but I've heard in some cases it messed up peoples computers. Is there any advantages in upgrading to Snow Leopard from Leopard? Thank you in advance for the advice!

Hi, I am interested in upgrading to snow leopard but I've heard in some cases it messed up peoples computers. Is there any advantages in upgrading to Snow Leopard from Leopard? Thank you in advance for the advice points will be given to multiple users. Here are my computer specs (Leopard 10.5.8.)
Model Name:    iMac
Model Identifier:    iMac7,1
Processor Name:    Intel Core 2 Duo
Processor Speed:    2 GHz
Number Of Processors:    1
Total Number Of Cores:    2
L2 Cache:    4 MB
Memory:    2 GB
Bus Speed:    800 MHz

You need not upgrade unless there is something you do that cannot be done unless you upgrade. Upgrading OS X doesn't mess up anyone's computer. Users mess up their computers.
Your model has 2 GBs of RAM which is adequate for Snow Leopard although 4 GBs would be better. Upgrading to Snow Leopard will cost $29.00. You can order from Apple's Online Store. Here's a good procedure to follow:
How to Install OS X Updates Successfully
A. Repair the Hard Drive and Permissions:
Boot from your current OS X Installer disc. After the installer loads select your language and click on the Continue button. Then select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger) and/or TechTool Pro (4.5.2 for Tiger) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
B. Make a Bootable Backup Using Restore Option of Disk Utility:
Open Disk Utility from the Utilities folder.
Select the destination volume from the left side list.
Click on the Restore tab in the DU main window.
Check the box labeled Erase destination.
Select the destination volume from the left side list and drag it to the Destination entry field.
Select the source volume from the left side list and drag it to the Source entry field.
Double-check you got it right, then click on the Restore button.
Destination means the external backup drive. Source means the internal startup drive.
C. Important: Please read before installing:
If you have a FireWire hard drive connected, disconnect it before installing the update unless you will boot from this drive and install the update on it. Reconnect it and turn it back on after installation is complete and you've restarted.
You may experience unexpected results if you have installed third-party system software modifications, or if you have modified the operating system through other means. (This does not apply to normal application software installation.)
The installation process should not be interrupted. If a power outage or other interruption occurs during installation, use the standalone installer (see below) from Apple Downloads to update. While the installation is in progress do not use the computer.
D. To upgrade:
Purchase the Snow Leopard Retail DVD.
Boot From The OS X Installer Disc:
Insert OS X Installer Disc into the optical drive.
Restart the computer.
Immediately after the chime press and hold down the "C" key.
Release the key when the spinning gear below the dark gray Apple logo appears.
Wait for installer to finish loading.
E. If updating:
Download and install update(s)
Use Software Update, or
Download standalone updater(s).

Should I take the plunge and upgrade to Snow Leopard?

I have a MacBook Pro with 2.53 GHz Intel Core 2 Duo processor and 4GB memory.
I have just upgraded my printer after the last one died, so now have no real reason stopping me to upgrade to Snow Leopard. The question is though, is there any real good reason to do so?
With 4GB of RAM I'm probably not going to get any benefit from the 64bit architecture, so I'm wondering whether I'm better off just waiting until the release of OS X 10.7?
Any thoughts?

My vote, Upgrade. It is great. Among many other things, the one thing that is noticeable and also impressive is the speed at which everything happens in SL. Way quicker than previous OSs. Also, some apps are upgraded like preview, image capture etc.
You might want to look at the reviews from last year.
http://thurly.net/stt
http://thurly.net/stu

I have new hard drive, should I use migration assistant before I install Snow Leopard or install Snow Leopard first?

I just had a new hard drive installed after a hard drive failure. I need to install Snow Leopard, Lion and VMware Fusion. Should I use migration assistant to reinstall my old files and applications first or should I install the new Operating Systems first? Some of the old files do have corrupt data and I will have to pick and choose what back-up files I re-install.

Pondini wrote:
memalyn wrote:
Some files were backed up on another external drive but not all.
How was that done? Drag & drop? An app like CarbonCopyCloner or SuperDuper?
Initially files were backed up on the iMac with Time Machine. I purchased a My Book external hard drive and after doing a full back up on it, I began doing all of my incremental back ups on it using Time Machine. Sometime later, I purchased a Western Digital external hard drive that included back up software on it called "WD Back-up" so I could use it to store all of my Music and Audiobooks on to keep my iMac and My Book free of those file types. The WD Backup software allowed me to pick and choose what files I wanted to back-up. I don't think I had been backing up Music and Audiobooks on the Mac anyway or maybe I was, I don't remember if I can selectively pick and choose files with Time Machine - I have not checked as I have not yet plugged it into my new hard drive. Once The My Book drive became full with regular back ups, around June or so I had to switch over to the WD Back up drive. I recall that I was very concerned that I could not do a full back up on the WD drive because if I did, I would have to reformat the drive and I did not want to do that, so I think I was able to selectively back up some additional files from my iMac but again, I do not know for sure since I have not looked at what is on the drive. I do know that if I was able to back up additional files I had to do it with WD Back up and not Time Machine, if that matters.
I know that the files in the partitioned drive and files associated with VMware Fusion are damaged. If I do a full restore, it will restore the VMware Fusion app and partioned drive
We need some clarification:
Do you mean there were 2 partitions on your internal HD? If so, how was the second one formatted? Was it backed-up?
No, there was only one partitioned drive. The way I understand it is the VMware Fusion software does the partitioning and the app resides on the Mac. After that was done, I then installed the Windows software on the partitioned drive. There is a critical file on the Mac under a Folder called Virtual Machines and in the Virtual Machines folder, the "Windows Bundle" or some such thing keeps locking each time the software crashes due to the problem files somewhere within the files in the VMware Fusion software that (I think resides) in the Windows environment that I cannot access. The Virtual Machine file on the Mac gets backed up so the Windows Bundles files get backed up and that includes all the screen shots (essentially backups) of the Windows environment. The Windows environment includes some of the apps and their data in Windows such as Quicken. Theoretically, the partitioned drive does not get backed up but in reality if the screen shots do, some of the partitioned drive does - corrupt or not. If you have a Quicken file open and a drop down screen in Quicken frozen when the system crashes, that is what gets backed up and there is no way you can get back into Windows or Quicken.
               If I do a full restore, it will restore the VMware Fusion app
If you restore an OSX volume, yes, that will restore all apps, but that's not necessarily bad. If necessary or desired, you can always delete or reinstall a suspect app. That way, all your other apps will be ok. For most users, reinstalling all apps is a considerable project. See Transferring Applications for an explanation.
Well, that is true. To reinstall VMware Fusion, Windows and Quicken would much, much easier than all of the Mac software I have. Plus, the VMware Fusion version I have is not compatible with Lion and my goal is to install Lion, so I will have to upgrade VMware Fusion no matter what. Further, I'm so aggravated with the dual operating system, I've been looking at products to replace Quicken, so if anyone knows of a good home, small business and home rental financial product they can recommend, I'm all ears!
               If I do a full restore, it will restore . . . and partioned drive
If there are 2 partitons, a full restore only restores the OSX partition. If a non-OSX partition was backed-up, it must be restored separately.
               Now that I've said I only have 1 partitioned drive, does that mean it will restore the partitioned drive? I would prefer it did not. It seems now that it would be much cleaner to restore the OSX drive. Would I be able to do that?
So, depending on the exact circumstances, your best be may be to restore the most recent OSX partition, then restore/copy those files that were backed-up on another drive; reinstall VMware if necessary; restore the other partition.
So . . . things may be a bit more complex than we though, but perhaps less dire.
More detail on the various partitions and backups should clarify things.

Purchasing external hard drive before upgrading to Snow Leopard

I have an early 2009 iMac running OS X 10.5.8. We are planning on purchasing Snow Leopard to upgrade to 10.6 and beyond but would like to back up what we have on an external hard drive first. Is there anything specifically we need to watch out for or be aware of when buying an external hard drive? Thanks in advance.

I second rkaufmann87's recommendation of OWC's external hard drives. I have 6 and have had no issues.

Hi I am interested in upgrading to snow leopard but I've heard it messed up peoples computers on occassion. Is there any advantages upgrading to Snow from Leopard?

Hi, I am interested in upgrading to snow leopard but I've heard in some cases it messed up peoples computers. Is there any advantages in upgrading to Snow Leopard from Leopard? Thank you in advance for the advice . Here are my computer specs (Leopard 10.5.8.)
Model Name:    iMac
Model Identifier:    iMac7,1
Processor Name:    Intel Core 2 Duo
Processor Speed:    2 GHz
Number Of Processors:    1
Total Number Of Cores:    2
L2 Cache:    4 MB
Memory:    2 GB
Bus Speed:    800 MHz

Hi, I am interested in upgrading to snow leopard but I've heard in some cases it messed up peoples computers. Is there any advantages in upgrading to Snow Leopard from Leopard? Thank you in advance for the advice . Here are my computer specs (Leopard 10.5.8.)
Model Name:    iMac
Model Identifier:    iMac7,1
Processor Name:    Intel Core 2 Duo
Processor Speed:    2 GHz
Number Of Processors:    1
Total Number Of Cores:    2
L2 Cache:    4 MB
Memory:    2 GB
Bus Speed:    800 MHz

LR 2.5 slows down after upgrading to Snow Leopard

This is my first post, so first of all I'd like to say hello to everybody here and apologize for my poor english
My computer is an iMAC with an Intel Core 2 Duo, 4GB RAM, 500GB HD and a graphic card NVIDIA GeForce 8800 GS with 512 MB VRAM.
The LR database is contains, up to now, about 5000 photos most of them in NEF format (my camera is a Nikon D300)
In the last month I noticed that the performance slowed down consistently as thumbnails refresh started taking a long time as well as editing photos and the overall LR2 (executing at 64bits) working.
I started monitoring the system, but despite the low LR2 performances I still had a lot of free RAM and the cores weren't really working a lot.
I can't say this for sure, but I could bet that the performance problems began with the upgrade to Snow Leopard.
Can anybody help me to solve this issue?
Thanks a lot in advance
Roberto

Ian Lyons wrote:
Lightroom performance should not have deteriorated as a result of upgrading to Snow Leopard. Things that you should check are:
1. that you are indeed running Lightroom in 64-bit mode (open System info under Help menu and check that Application Architecture shows x64)
2. that you have all of your previews rendered to at least Standard-size
3. that you have at least 20% free hard disk space
You should also run the Catalog Optimisation option in Catalog Settings
1. Yes, LR2 was running in 64 bit mode before upgrading to Snow Leopard, then (don't know why) gets back to 32 just after the upgrade and I manually set it to 64 bit (checked in the application and on the process monitoring while running)
2. I have the preview rendered 1:1 in the folder I'm working on (done again tonight)
3. I have 55% free HD space
4. I run a Catalog Optimization many times, The last one was tonight
In other words I've checked and tried all these things many times. I've red on the internet that it might be a geforce 8800 issue, but I've found only windows references. Don't forget that neither RAM nor CPU are stressed when LR2 is working and all other applications run normally

Aperture 2.1.4 - No preview or thumbnails after upgrading to Snow Leopard

I had upgraded to Aperture 2.1.4 before upgrading to Snow Leopard and everything worked fine. But since I installed SL, whenever I make a new version, I get no preview (just a big gray box) and no thumbnail (just a dotted lined box). So this makes Aperture absolutely useless to me. Apple says my service period has expired and I need to pay $199 to get any tech support to remedy this. I think that's ridiculous because I think this is a problem caused by SL.
Before I pay this stupid fee, does anyone have any suggestions on how to fix this? I've tried uninstalling and reinstalling but nothings changed.
In the meantime, I've switched everything over to Lightroom. So Apple better get this resolved or its losing a good customer to Lightroom!
Thanks... David

Hey Tony...
Thanks for the response.
I am using a Canon 5D Mark II and import RAW files. But I don't think it's a camera specific issue. Even is I import a plain old jpeg and make a new version of it, all I get is a outlined box for a thumbnail and a big gray box for a preview. And the little spinning "loading" wheel goes on forever.
I have gone to that support page and have done everything on it without success. I'm out of ideas.
David

Titles and Transitions doe not work after upgrading to Snow Leopard

I can not get my Titles or transitions to work in iMovie any more after upgrading to Snow Leopard.
Everything goes to a black screen. I am having problems with final cut express also. Anyone have an idea when there will be a patch to fix this? I would hate to have to down grade.

Holy *&$^, no kidding. I mean this is bad. I can't really do anything on iMovie at all. I really hope there is a simple solution to this, b/c if this really is part of a bad release, Apple will not hear the end of it.

Font Problem after Upgrade to Snow Leopard?

Has anyone else noticed this? I open a Keynote I had just done before upgrading to Snow Leopard, and the Bullets and font are all jumbled together, and don't play when I try to play the slideshow?

I noticed the same jumbled text problem.
When I went to look at Font Book, I see that those fonts are no longer installed. It must've happened when I loaded Snow Leopard last weekend.
Anyway, I went to reinstall fonts, and I see I've got a bunch that got uninstalled. But when I try to reinstall them, like Calisto and Caligula to name the first couple I tried, Font Book reports that there were serious errors when trying to load them.
Does anyone have insights into the vague message: "System Validation" as the serious problem? I don't see a way to get more details about the problem than that.

Hi, I am trying upgrade to Snow leopard 10.6.8 from 6.3(trying to install Lion). After downloading the software i m getting a message "can not install on the HD, install 6.5 before proceeding further. I coud not understand. Any suggestions, I appreciate.

Hi, I am trying upgrade to Snow leopard 10.6.8 from 6.3(trying to install Lion). After downloading the software i m getting a message "can not install on the HD, install 6.5 before proceeding further. I coud not understand. Any suggestions, I appreciate.

install 6.5 before proceeding further. I coud not understand.
Just what it says - install os 10.6.5 before proceeding further. You can either do so through Software Update or use the Combo update from Apple's download site.
You should repair permissions and restart your computer prior to updating and upgrading.

I'm running snow leopard. The try to open any .mov file in Quicktime, and I get an error message that says, "The document xyz.mov could not be opened. The movie is not in a format that Quicktime player understands. I'm a recent upgrade to Snow Leopard.

I'm running snow leopard. The try to open any .mov file in Quicktime, and I get an error message that says, "The document xyz.mov could not be opened. The movie is not in a format that Quicktime player understands. I'm a recent upgrade to Snow Leopard.
Help!
Thanks, Mark

Unfortunately, the error message gives no details about what codec might be missing or what it needs.
If the file can't be opened in QT, it only means you cannot use the QT "Inspector" window to check what compression formats were used to create the file. It does not mean you can't use the Finder "Information" window to check on the compression formats or use a third party media information window (e.g., like VLC which will open many compression formats not supported natively by QT) to determine what kind of data is included in the MOV wrapper. If the file cannot be opened in any app, it is usually a good sign that the file itself is corrupted.
It's a stupid error message. Apple should do better than that.
Error trapping is quite extensive but there are still many areas which require human oversight. The message is telling you that either the container has a problem (e.g., not properly terminated, non-standard, or corrupted) or that one or more of the compression formats used is not supported by your current codec component configuration or that the data was encoded using non-standard settings or preferences not supported by QT or that the fourCC code does not match the data contained in the file or that there are timecode inconsistencies, etc., etc., etc. In short there are a near infinite number of possible problems for which it would be very difficult/nearly impossible to program error trapping depending on your sourcing of content and how you process it before it reaches the player app. Think of it like trying to play a BD disc in an DVD player.
I'll call Apple support when I get a chance.
Chances are good that they will end up sending you back here. In any case, it is often a good idea to post a sample file for examination by other QT users. At the very least, they should be able to tell you if the sample file will play on other systems which would indicate whether or not the file itself is bad and under the best of circumstances whould allow them to examing the file in detail for various common problems.

Should I upgrade to Snow Leopard/ Lion using a MacBook Pro with 2.26 GHz Inetl Core 2 Duo Processor and 2GB Memory? Can my old macbook take it?

Should I upgrade to Snow Leopard/ Lion using a MacBook Pro with 2.26 GHz Inetl Core 2 Duo Processor and 2GB Memory? Can my old macbook take it?
thanks

Yes. You should be fine with Snow Leopard, but Lion requires a minimum of 2 GBs of RAM. If you upgrade to Lion I would first upgrade your RAM to at least 4 GBs if your model supports it. Also, see:
How to Install OS X Updates Successfully
A. Repair the Hard Drive and Permissions:
Boot from your current OS X Installer disc. After the installer loads select your language and click on the Continue button. Then select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger) and/or TechTool Pro (4.5.2 for Tiger) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
B. Make a Bootable Backup Using Restore Option of Disk Utility:
Open Disk Utility from the Utilities folder.
Select the destination volume from the left side list.
Click on the Restore tab in the DU main window.
Check the box labeled Erase destination.
Select the destination volume from the left side list and drag it to the Destination entry field.
Select the source volume from the left side list and drag it to the Source entry field.
Double-check you got it right, then click on the Restore button.
Destination means the external backup drive. Source means the internal startup drive.
C. Important: Please read before installing:
If you have a FireWire hard drive connected, disconnect it before installing the update unless you will boot from this drive and install the update on it. Reconnect it and turn it back on after installation is complete and you've restarted.
You may experience unexpected results if you have installed third-party system software modifications, or if you have modified the operating system through other means. (This does not apply to normal application software installation.)
The installation process should not be interrupted. If a power outage or other interruption occurs during installation, use the standalone installer (see below) from Apple Downloads to update. While the installation is in progress do not use the computer.
D. To upgrade:
Purchase the Snow Leopard Retail DVD.
Boot From The OS X Installer Disc:
Insert OS X Installer Disc into the optical drive.
Restart the computer.
Immediately after the chime press and hold down the "C" key.
Release the key when the spinning gear below the dark gray Apple logo appears.
Wait for installer to finish loading.
E. If updating:
Download and install update(s)
Use Software Update, or
Download standalone updater(s).

Do I need to upgrade from tiger to leapord before upgrading to snow leopord?

Do I need to upgrade from tiger to leapord before upgrading to snow leopord?

No. You can update directly to Snow Leopard.
How to Install OS X Updates Successfully
A. Repair the Hard Drive and Permissions:
Boot from your current OS X Installer disc. After the installer loads select your language and click on the Continue button. Then select Disk Utility from the Installer menu (Utilities menu for Tiger and later.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger) and/or TechTool Pro (4.5.2 for Tiger) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
B. Make a Bootable Backup Using Restore Option of Disk Utility:
Open Disk Utility from the Utilities folder.
Select the destination volume from the left side list.
Click on the Restore tab in the DU main window.
Check the box labeled Erase destination.
Select the destination volume from the left side list and drag it to the Destination entry field.
Select the source volume from the left side list and drag it to the Source entry field.
Double-check you got it right, then click on the Restore button.
Destination means the external backup drive. Source means the internal startup drive.
C. Important: Please read before installing:
If you have a FireWire hard drive connected, disconnect it before installing the update unless you will boot from this drive and install the update on it. Reconnect it and turn it back on after installation is complete and you've restarted.
You may experience unexpected results if you have installed third-party system software modifications, or if you have modified the operating system through other means. (This does not apply to normal application software installation.)
The installation process should not be interrupted. If a power outage or other interruption occurs during installation, use the standalone installer (see below) from Apple Downloads to update. While the installation is in progress do not use the computer.
D. Download and install update(s) if updating:
Use Software Update, or
Download standalone updater(s).
E. To upgrade from an earlier major version:
Purchase the requisite installer package (Snow Leopard for example.)
Boot from the installer DVD.
Choose the install option:
None required for Snow Leopard.
Archive and Install for versions prior to Snow Leopard.

Any reasons to be worried about upgrading to Snow Leopard?

I have a Mac book with a 2.4 GHz Intel Core 2 Duo. I would like to upgrade to Snow Leopard to be able to run a piece of software that requires it. But, I'm nervous about doing the upgrade and breaking my machine in any way. My wife would kill me if something went wrong. Will Snow Leopard run well on my machine?

How to Install OS X Updates Successfully
A. Repair the Hard Drive and Permissions:
Boot from your current Tiger Installer disc. After the installer loads select your language and click on the Continue button. Then select Disk Utility from the Installer menu (Utilities menu for Tiger and later.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger) and/or TechTool Pro (4.5.2 for Tiger) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
B. Make a Bootable Backup Using Restore Option of Disk Utility:
Open Disk Utility from the Utilities folder.
Select the destination volume from the left side list.
Click on the Restore tab in the DU main window.
Check the box labeled Erase destination.
Select the destination volume from the left side list and drag it to the Destination entry field.
Select the source volume from the left side list and drag it to the Source entry field.
Double-check you got it right, then click on the Restore button.
Destination means the external backup drive. Source means the internal startup drive.
C. Important: Please read before installing:
If you have a FireWire hard drive connected, disconnect it before installing the update unless you will boot from this drive and install the update on it. Reconnect it and turn it back on after installation is complete and you've restarted.
You may experience unexpected results if you have installed third-party system software modifications, or if you have modified the operating system through other means. (This does not apply to normal application software installation.)
The installation process should not be interrupted. If a power outage or other interruption occurs during installation, use the standalone installer (see below) from Apple Downloads to update. While the installation is in progress do not use the computer.
D. To upgrade:
Purchase the Snow Leopard Retail DVD.
Boot From The OS X Installer Disc:
Insert OS X Installer Disc into the optical drive.
Restart the computer.
Immediately after the chime press and hold down the "C" key.
Release the key when the spinning gear below the dark gray Apple logo appears.
Wait for installer to finish loading.
E. If updating:
Download and install update(s)
Use Software Update, or
Download standalone updater(s).

Should I do any "maintenance" before upgrading to Snow Leopard?

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