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Message: <blockquote data-quote="kalendaan" data-source="post: 1646786" data-attributes="member: 346463">I only recently started using reddit as a forum service before this i never really found and answer to this problem any where I've been searching for months and my imac is just collecting dust <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown    :(" loading="lazy" data-shortname=":(" />so this is the problem, i had OS mavericks and when the yosemite update came out i downloaded it and wanted to update, it went through the usual update cycle and the installation process, it goes to about 80% of the installation then this error shows up : <a href="http://imgur.com/HIxst5c" target="_blank">http://imgur.com/HIxst5c</a>I have almost no knowledge about mac's technical issues and troubleshooting, so i do not know if this a big or a small problem and also i do not have a original os installation cd nor am i able to get out of this stage, please help me bring this thing back to lifethanks</blockquote>

Verification: How many occurrences of a n-u-m-b-e-r between "d" and "f" in this example...(sdgs6ngklu3gd#f9%)?