sorry if this has been discussed endlessly, but.....
I seem to have to be forever repairing permissions and recently re-installed the system fro 10.6 CD, then software update to 10.6.8 again.
I mostly only use a few programmes: DxO optics (photoprocessing), GraphicConverter (photo-sorting etc) Safari, Mail, Nikon Transfer (getting the images from the camera). I would use Nikon Capture more only daren't. They are all latest versions. Don't want to move to 10.7 as I also occasionally use progs needing Rosetta (Color-it & FocusMagic plug-in for CS4)
The progs seem to fight each other for memory/CPU attention, then slow down when they don't get it. Safari is at least as bad as the others, though its DxO that actually needs the power.
There is no obvious hardware fault.
Is there anything else I can do to try to improve things?
4GB is all this particular model (MacBookPro4,1 Intel Core 2 Duo) will take
It has a 500GB Western Digital internal HD with 160GB free
I noticed that the last hardware test has a silly date (28/2/4012); think I have to go back to the 10.5.4DVDs supplied to get it up to date? Just doing a back up first!
Boot up from your Snow Leopard Install DVD while holding down the "c" key.
Select the language you wish to use, and then choose "Disk Utility" from the menu bar.
Your HD should appear in a panel on the left hand side of the window which opens. Select it and then click on the "repair disk" button in the right hand section of the window.
If Disk First aid is unable to complete the repair you will need to use a stronger 3rd party utility like DiskWarrior or TechTool Pro.
Once this process has been completed restart your computer.
I did this and it carried out repair sequence ending disk appeared OK in less than 10 minutes
@Austin Kinsella1 Austin, I don't think I understand what you are looking for.
There does not seem to be an 'errors' list other than the 'error_log' I posted a part image of above. The main repeat is "W [22/Jan/2013:09:58:47 +0000] No limit for Validate-Job defined in policy authenticated - using Print-Job's policy". Everything is related to printing, which actually works quite well now with a new Epson P50 & is using software update provided by Apple; only I don't leave the printer on except when in use & don't have enough USB ports for it to be in line all the time anyway.
It will possibly fill in any corrupted or missing files from 10.6.0 on. It may sometimes be useful as a troubleshooting step, but it is not the same as a reinstall. A reinstall, which involves booting and installing from the install DVD, will revert the system files to whatever version as of the install DVD, while leaving settings, users and third party programs in place.
I have recently done a system re-install from the Snow Leopard Install DVD (2 hours!) then Software Update downloaded the 10.6.8 combo & installed that. (As you imply, the combo is different from another 10.6.8 which will only install over 10.6.7)
The other thing that has come up ref Safari is that I have GimmerBlocker installed and Console has some words to say on that. I suppose it would slow down Safari operation, but I would not have thought cause it to 'hang' nor the effects of that to overflow to other progs.
Maybe DxO is just pretty heavy on a 5 year old machine
First, there will always be repeating Permssions messages. You can ignore those and stop repairing Permissions; it's not needed.
Two ways of dealing with the slowdowns. I'm not seeing any excessive paging in your System Memory screenshot, but it might help anyway to run fewer programs concurrently, if possible. Other than that, install Developer/XCode from optional installs on the install DVD. When things slow down, you will be able to run purge (from Terminal), which will clear the virtual memory being used. But this will only be a temporary fix, until the VM starts accumulating again.