13" aluminum unibody, 2.0 or 2.4 GHz Core 2 Duo processor.

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Freezing and slow boot up

Hello I have a late 2008 13"aluminum Macbook which was running very hot. I decided to download SMCfancontrol to increase the fan speed and I also upgraded the ram. The heat problem is corrected but my computer freezes up very often. Here are more specs, 2 GhZ intel core 2 duo running OS X 10.8.4 I have 8 gig of ram 1067 MHZ DDR3. I hope someone can help me because I can't afford a new one and I need this computer. It seems to work fine sometimes for even a hour or two but usually it will freeze within a 20 minute period of time. I eventually keep my finger on the power button to shut it off then wait 3 minutes to start it up. Any help would greatly be appreciated.

Thanks

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Are you still have your original HD or did you replace it at some point? If you did what did you put in manufacture and model info.

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You are corrupting your HD, and that's probably causing/contributing to your freezing.

Every HD has a master boot directory... Think of it as an office manager board, you know one of those boards that show who's in, who's out, who's at lunch and what office number belongs to whom.

Now imagine every time you force quit/restart the computer that board falls to the floor and all the letters pop off. Lets further imagine that a illiterate "helps" the secretary rehang the board and pickup the letters and numbers off the floor and sticks the data back on. . . without knowing/caring if the date is accurate. Maybe the get some of it correct, but soon (say 20 minutes) the board falls to the floor again, All the data is scrambled an once more it's hung back up with the kind help of carless illiterates.... getting the picture?

Your freezing is possibly the computer trying to access a file that is no longer where expected - or that the file is corrupt because it wasn't gracefully closed/quit/saved.

You need to boot from a startup/repair disk (TechToolPro or Disk Warrior) and run directory repair.. repair permissions, scan for damaged sectors/data and defrag-remap the MBD of your HD.

This may solve your freezing problem.

Another issue could be that you need 20% of your total HD empty as free space for VMem and swap files... if you don't have that your use could fill the VMem and cause a freeze. BTW by increasing the RAM you also increased the VMem requirement.

If this Answer is helpful please remember to return and mark it Accepted.

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I have a 1TB HD I looked up my specs and it says I have Capacity of 999.35 and available 960.38 Where can I get those repair discs? I dont have any discs that came with this computer.

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You buy those 3rd party repair disks at a box store or online (if you have access to a reliable mack you can download some of them) and burn a DVD/CD while waiting for the snail mail boot repair version of the app to arrive.

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Making/keeping a backup of essential files is a standard procedure. Many ignore until they need a backup. You don't have to backup the OS or apps... (though you can) just data.

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Your drive is very full! So the OS has no room to work off of.

First Thing To Do: You'll need to make a backup of your files onto an external drive (I would recommend something larger like 3-4 TB). Given the age of your system you'll want to get a FireWire drive as the I/O speed is much faster than USB2. No matter what else do this if you care about all of your stuff and afterwards maintain it.

Second - Options Think about deleting no longer needed stuff (freeing up around 500 MB) or getting a second external drive to use to hold some of your stuff or think about upgrading it to a larger internal HD (2 TB).

The Next Step: You'll need to get a 16 or 32 GB Flash drive to create a boot disk. Then using the Mountain Lion install image prep the flash drive as a bootable drive. Once done you should be able to boot up under it. It will take a bit of time to boot up as the USB I/O is slow. Given how full your HD is now I'm not sure if you could prep a FireWire HD without the installer crashing (it needs a fair amount of memory & HD space to run) which is why we need to do things in this order.

Once the flash drive boots up you can follow what MacHead explained as you need to fix the directory corruption. I would use whats free first, Apple's Disk Utility should get you started here. Then as your drive was so full you'll need to defragment it as well I prefer Drive Genius for it's total collection of tools it offers. What you'll need to do with any 3rd party drive or defragmenter tool is run it from an external bootable drive (in our example here the flash drive). As your current drive is likely one partition.

Replacing your HD: If you decide to upgrade the HD to a larger drive. Make sure it fits your system (height wise). Before you do anything again make a backup of your apps & data, free up as much space as you can and prep the flash drive as outlined above so it's bootable. You will also need to copy over the OS installer to the flash drive as you'll need it to prep your new drive.

Only after you have prepped the flash drive swap your HD out with the new one following the iFixit Guide. Once your drive is installed use the flash drive to boot up from and prep your HD.

I would recommend partitioning it into two partitions. the first being 1/3 of the drive space to hold your OS & apps and have free space for the OS. Then the other partition to hold your files. Doing this lessens the amount of fragmentation as the partition with your data files will fragment out long before the first partition will with just the OS & apps and can be more easily defragmented without needing to boot of an external drive (running from the first partition). This also protects the OS & apps and the needed free space on the first partition.

Lastly, you should try to find a external FireWire case to house your old internal drive so you can use it as a spare drive (USB2 is just too slow IMHO). You'll also need this to copy back your apps and data unless you use the your backup files to recover them. Given the state of your drive currently you may find a few files corrupted hopefully you can rebuild them or re-install the application to fix the damage.

- Good Luck!

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Hey thanks for your response but my 1TB HD is almost all free memory. It's not even close to full. I'm only using approximately 30 gigs out of the almost 1000 gigs. I will try disk utility but my system is now freezing (spinning ball) almost immediately at start up?

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I guess I need my eyes checked ;-} Sorry!

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OK - That implies the drive SATA speed is an issue. First see if you can re-download the installer for ML onto a bootable flash drive. Then reboot under it. locate the Apple Disk Utility program and see what it says about your HD. What is the SATA spec and also try to run drive repair (not permissions). You will also want to check the EFI firmware level Apple TN. If its not the latest for your system update it as they did have some firmware issues.

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If your Mac is booting slow then you must check the fragmentation status of your Mac hard drive because if files remain scattered over hard disk then processor takes too much time to pick all file chunks and open it. Stellar Drive Defrag is one of the best tool to defrag Mac. Free version of this tool scans your whole Mac and show fragmented data to you.

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You do make a good point on defraging the HD. But in this case the system is overheating which is a symptom of using a SATA III drive in these older systems SATA I/II. What happens is the CRC error rate is very high causing the CPU & HD to work much harder. As the systems SATA interface can't handle the data flow rate (read or write).

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