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Mac Desktops forum

Resolved Question

Computer keeps freezing

by pinnickfan / November 2, 2014 11:49 PM PST

I have an older iMac (2006 model). I am running 10.7.5. Over the summer my Mac keep freezing. It would happen occasionally, then it would happen every single time that I used it. It would often happen while running Firefox, but the problem was not limited to Firefox. Anything would cause it to freeze at any random time. The problem continued to get worse. Then, upon startup, Finder kept crashing and all desktop icons would disappear, then reappear with a message saying that Finder had a problem and needed to restart. This happened over and over and over. Repairing permissions helped, but after every freeze, it would happen again. I suspected a hard drive issue. I downloaded Oynx and ran it. Besides the permissions issues, everything else seemed fine. I also downloaded another tool (don't remember the name) that told me more detailed info about the hard drive and it basically said that the drive was in good, working order. No physical problems.

I did a complete reinstall of the OS and things worked well for a while, with an occasional freeze. Now the same things are happening again. Computer freezes all of the time. Same Finder issues exist.

I'm trying to hold off buying a new computer. What is going on and can it be fixed?

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All Answers

Best Answer chosen by pinnickfan

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Tell more about your maintenance.
by R. Proffitt Forum moderator / November 2, 2014 11:57 PM PST

That is, the usual canned air cleaning and at this age, the heatsink compound is likely all dry and cracked. While the tech is in there, inspect for BAD CAPS.

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by pinnickfan / November 3, 2014 12:08 AM PST

Other than software maintenance, I have not done much, if any, hardware maintenance.

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May be time. Canned air example video.
by R. Proffitt Forum moderator / November 3, 2014 12:15 AM PST
In reply to: Maintenance
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by pinnickfan / November 3, 2014 12:33 AM PST

Thank you. I will do this later today. Should I look into have the heat sink compound replaced?

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There are tomes on the web about that.
by R. Proffitt Forum moderator / November 3, 2014 12:45 AM PST
In reply to: Thanks

Since you didn't do the canned air once every few months, that may be enough to keep it going. If the lockups reduce or go away then going inside will likely help. Heat sink compound itself is pretty cheap. Not so much the labor.

However before going there, be sure you have all files you have on backups (notice the plural please.)

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