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Question: Slow Mac.

I downloaded Yosimite about 12 months ago only to find my system hobbled with the rainbow whirly thing. Desperate I followed advice on this site and re-fomatted the HD and re-installed Yosimite. It took me nearly all day. All fine now and MacBook is performing well. I think the original download from Apple was not integrated properly and probably I had a half and half installation.

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Mar 16, 2018 2:48 PM in response to sydfromstockport In response to sydfromstockport


In order to help you, the results of an EtreCheck report would probably reveal why you're seeing the rainbow and why your Mac's running. Without the results of an EtreCheck report, it's just a guessing game.

Click here > https://etrecheck.com/

Then click: Free Download

Only takes a second or two to download. Then go to your Downloads folder and double click EtreCheck then follow the instructions then copy and paste the results in your Reply.

No personal data is shared.

Mar 16, 2018 2:48 PM

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Question: Slow Mac.