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After restart iMac Thunderbird disappears and I have to re-install

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Hi, every time I restart my iMac I cant find Thunderbird. The icon is missing and after a search it doesn't find anything. I have to download the instal program again en run it. After that Thunderbird finds my directory and emails. It looks like the installation is going wrong or something. Anyone an idea what is happening?

Thanks..

Hi, every time I restart my iMac I cant find Thunderbird. The icon is missing and after a search it doesn't find anything. I have to download the instal program again en run it. After that Thunderbird finds my directory and emails. It looks like the installation is going wrong or something. Anyone an idea what is happening? Thanks..

All Replies (1)

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I'm a Windows tech, not a Mac tech, but I can tell you that your first step should be to check the hard drive for problems.

How to run "Disk Utility" in Mac OS https://support.apple.com/en-ca/HT201639 http://osxdaily.com/2012/05/24/check-hard-drive-health-mac-disk-utility/