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Apple Computing Products:
macOS - Operating System
High Sierra to Yosemite Downgrade
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<blockquote data-quote="gsahli" data-source="post: 1792058" data-attributes="member: 182015"><p>one option - use Time Machine to restore to a time just before the update.</p><p></p><p>otherwise, </p><p>1. make sure you have a complete backup (Time Machine will do)</p><p>2. start from the USB installer,</p><p>3. Use Disk Utility and erase or re-partition the drive</p><p>4. install</p><p></p><p>(PS = I'd bet that there's an actual cause to the sluggishness, not High Sierra)</p></blockquote><p></p>
[QUOTE="gsahli, post: 1792058, member: 182015"] one option - use Time Machine to restore to a time just before the update. otherwise, 1. make sure you have a complete backup (Time Machine will do) 2. start from the USB installer, 3. Use Disk Utility and erase or re-partition the drive 4. install (PS = I'd bet that there's an actual cause to the sluggishness, not High Sierra) [/QUOTE]
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Apple Computing Products:
macOS - Operating System
High Sierra to Yosemite Downgrade
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