<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">I have noticed the following with OS X 10.11.4 (15E65):<div class="">Partitioning the internal drive using diskutil (command line) or the much loathed 'Disk Utility v. 15.0’ will damage the hidden recovery partition named ‘Recovery HD’ such that one can no longer boot into recovery mode.</div><div class="">This is true whether one is performing the partitioning from Recovery Mode or from normally booted Macintosh.</div><div class="">The Macintosh hangs or presents <a href="http://apple.com/support" class="">apple.com/support</a> -30001F when attempting to boot into Recovery Mode after partitioning disk0.</div><div class=""><br class=""></div><div class="">1. This appears to be the case whether disk0 is formatted CS or not</div><div class="">2. This has been confirmed only on disk0 (built-in internal drive). Have not experimented with others.</div><div class="">3. This has been confirmed on computers with fresh install of OS X 10.11.4 (both with previous 'Recovery HD' present and with it removed (and re-created by OS X 10.11.4 installer)).</div><div class="">Recovery Mode works fine until one changes the partition map of disk0.</div><div class="">4. Following partition of disk0, diskutil will still list ‘Recovery HD’ normally, but it no longer works</div><div class="">5. restoring the partition scheme to single partition does NOT undo ‘Recovery HD’ damage. it is still hosed.</div><div class=""><br class=""></div><div class="">will file bug with Apple.</div><div class=""><br class=""></div><div class="">dk</div><div class=""><br class=""></div><div class=""><div class=""><div class=""><div apple-content-edited="true" class=""><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px;">|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||<br class="">duncan kincaid<br class="">cron | mit school of architecture and planning<br class=""><br class=""><br class=""><br class=""></span>
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