Can't unlock any settings or install apps


hello,

have problem authorising admin tasks (like installing new apps, unlocking system settings etc.). have admin account password, yet system won't authorise it. prompt shakes around if password incorrect. however, i'm able log account without problems, assume login details fine.

i've noticed "username" field blank default (while usualy it's there when prompt appears) - please see attached image file. if type username manually, still wouldn't work.

not sure it, i've never seen this. appreciated!
 

attached files:



Forums Macs macOS OS X Yosemite (10.10)


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  • Wireless

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