crwdns2934241:0crwdne2934241:0 arbaman

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@Astié Rémy     Have a look at this Apple help page: https://support.apple.com/en-us/HT200553

If that’s the window that appears after restart, click on the corresponding “report” button and it would open a long error message full of all sorts of data. Usually the reason for restart is reported briefly in the first couple of lines.

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open