{"id":27401,"date":"2025-05-02T16:53:06","date_gmt":"2025-05-02T14:53:06","guid":{"rendered":"https:\/\/www.tuttologia.com\/mac\/?p=27401"},"modified":"2025-05-02T16:53:06","modified_gmt":"2025-05-02T14:53:06","slug":"macos-sequoia-troubleshooting-and-problem-solving-guide","status":"publish","type":"post","link":"https:\/\/www.tuttologia.com\/mac-blog\/macos-sequoia-troubleshooting-and-problem-solving-guide\/","title":{"rendered":"macOS\u00a0Sequoia\u00a0\u2013 Troubleshooting and Problem\u2011Solving Guide"},"content":{"rendered":"\n
\"macOS\u00a0Sequoia\u00a0\u2013
macOS\u00a0Sequoia\u00a0\u2013 Troubleshooting and Problem\u2011Solving Guide<\/figcaption><\/figure>\n\n\n\n
\n

20 steps<\/strong> (updated May 2025)<\/p>\n\n\n\n

Updated edition of the historic \u201cMac OS X: Troubleshooting and Problem\u2011Solving Guide\u201d<\/em> by Mac Peer.<\/p>\n\n\n\n

Heads\u2011up<\/strong> : Some procedures apply only to Intel\u2011based Macs; steps for Apple Silicon (M1\u2011M3) are flagged where relevant.<\/p>\n<\/blockquote>\n\n\n\n

\n

When to use this guide<\/strong>: Work through the steps in order<\/strong> whenever your Mac slows down, freezes, crashes, or otherwise misbehaves. After each step, check whether the issue is fixed before moving on.<\/p>\n<\/blockquote>\n\n\n\n

\n\n\n\n

At a glance<\/h2>\n\n\n\n

01 Restart  \u2502 02 Check free space  \u2502 03 (Obsolete) Repair permissions  \u2502 04 First Aid disk  \u2502 05 New user  \u2502 06 Clear caches (only if needed)  \u2502 07 REMOVED prebinding  \u2502 08 Safe Boot  \u2502 09 Reset NVRAM\/PRAM  \u2502 10 (Legacy) open\u2011firmware reset  \u2502 11 Disconnect peripherals  \u2502 12 Reinstall \/ update macOS  \u2502 13 Apple Diagnostics  \u2502 14 Check SSD\/HDD health  \u2502 15 Remove added RAM (Intel)  \u2502 16 Remove PCIe cards (Mac Pro)  \u2502 17 Reset SMC \/ power management  \u2502 18 Clean reinstall (Recovery \/ Erase All Content)  \u2502 19 Restore from backup  \u2502 20 Apple Support<\/p>\n\n\n\n

\n\n\n\n

01 Restart<\/h3>\n\n\n\n

A simple restart often clears temporary glitches. If the issue does not return, it was likely transient.<\/p>\n\n\n\n

02 Make sure there\u2019s enough free space on the startup volume<\/h3>\n\n\n\n

macOS needs 10\u201320 %<\/strong> of free disk space for swap files, APFS snapshots, and system updates. Check with \uf8ff > System Settings > General > Storage<\/strong> and remove large or unneeded files.<\/p>\n\n\n\n

03 (Obsolete) Repair permissions<\/h3>\n\n\n\n

Since OS X El Capitan\u202f(10.11)<\/strong> the system protects its own files automatically; Disk Utility no longer offers a \u201cRepair Permissions\u201d button. Forget about this step.<\/p>\n\n\n\n

04 Run First Aid on the startup disk<\/h3>\n\n\n\n
    \n
  • macOS\u00a0Sequoia<\/strong>: open\u00a0Disk Utility \u203a First\u00a0Aid<\/strong>\u00a0on your APFS volume.<\/li>\n\n\n\n
  • If the Mac won\u2019t boot: enter\u00a0macOS\u00a0Recovery<\/strong>\u00a0(hold Power on Apple\u00a0Silicon, or \u2318\u2011R on Intel) and run First\u00a0Aid from there.<\/li>\n<\/ul>\n\n\n\n

    05 Create a new user account<\/h3>\n\n\n\n

    Create a temporary user under \uf8ff > System Settings > Users & Groups<\/strong>. If the problem disappears when logged into the new account, the issue is confined to the original user\u2019s Library.<\/p>\n\n\n\n

    06 Clear system and user caches (only if necessary)<\/em><\/h3>\n\n\n\n

    macOS normally prunes caches automatically. You can force a clean\u2011up by booting into Safe Mode<\/strong> (see step 08) or manually deleting ~\/Library\/Caches<\/code>, but do this only when troubleshooting a clear cache\u2011related problem.<\/p>\n\n\n\n

    07 Removed \u2013 Force system prebinding<\/h3>\n\n\n\n

    The update_prebinding<\/code> command disappeared after OS X Snow Leopard; the functionality is baked into modern macOS.<\/p>\n\n\n\n

    08 Boot in Safe Mode<\/h3>\n\n\n\n
      \n
    • Apple\u00a0Silicon<\/strong>: shut down \u2192 press and hold Power until Startup Options appear \u2192 select your volume \u2192 hold\u00a0Shift<\/strong>\u00a0and click\u00a0Continue in Safe Mode<\/strong>.<\/li>\n\n\n\n
    • Intel<\/strong>: power on while holding\u00a0Shift<\/strong>.
      Safe\u00a0Mode disables third\u2011party extensions, clears certain caches, and performs a disk check on startup.<\/li>\n<\/ul>\n\n\n\n

      09 Reset NVRAM\/PRAM<\/h3>\n\n\n\n
        \n
      • Intel<\/strong>: power on and hold\u00a0\u2325\u2011\u2318\u2011P\u2011R<\/strong>\u00a0for two startup chimes.<\/li>\n\n\n\n
      • Apple\u00a0Silicon<\/strong>: a normal restart resets NVRAM automatically; no key combo is required.<\/li>\n<\/ul>\n\n\n\n

        10 (Legacy) Reset open\u2011firmware \/ NVRAM PPC<\/h3>\n\n\n\n

        Applies only to PowerPC Macs, which are no longer supported.<\/p>\n\n\n\n

        11 Disconnect external USB\/Thunderbolt devices<\/h3>\n\n\n\n

        Restart with only the Apple keyboard and mouse connected to rule out hardware or driver conflicts.<\/p>\n\n\n\n

        12 Reinstall \/ update macOS<\/h3>\n\n\n\n

        \u201cCombo updates\u201d vanished after macOS Big Sur. To refresh the system download the full macOS Sequoia installer<\/strong>from the Mac App Store or choose Reinstall macOS<\/strong> in Recovery. Your data remains intact.<\/p>\n\n\n\n

        13 Run Apple Diagnostics<\/h3>\n\n\n\n
          \n
        • Apple\u00a0Silicon<\/strong>: from Startup Options press\u00a0\u2318\u2011D<\/strong>.<\/li>\n\n\n\n
        • Intel<\/strong>: power on holding\u00a0D<\/strong>\u00a0(or\u00a0\u2325\u2011D<\/strong>\u00a0for Internet Diagnostics).
          Note any reference codes produced.<\/li>\n<\/ul>\n\n\n\n

          14 Check for bad blocks \/ SSD health<\/h3>\n\n\n\n

          In Disk Utility choose View \u203a Show All Devices<\/strong>, select the physical disk and review the SMART\/Health<\/strong> information. Third\u2011party tools like DriveDx or TechTool Pro offer more granular data. Back up immediately if errors appear.<\/p>\n\n\n\n

          15 Remove added RAM modules<\/h3>\n\n\n\n

          Only relevant for Intel Macs with user\u2011replaceable RAM. Test each module individually to isolate faulty DIMMs.<\/p>\n\n\n\n

          16 Remove third\u2011party PCIe cards<\/h3>\n\n\n\n

          Pertains exclusively to the Mac Pro<\/strong>. Ensure you have the latest firmware and drivers from the card manufacturer.<\/p>\n\n\n\n

          17 Reset SMC \/ power management<\/h3>\n\n\n\n
            \n
          • Intel without T2<\/strong>: follow the Apple support instructions for your model.<\/li>\n\n\n\n
          • Intel with T2<\/strong>: press\u00a0Control\u2011Option\u2011Shift<\/strong>\u00a0(left side) + Power for 10\u00a0seconds, then release and start normally.<\/li>\n\n\n\n
          • Apple\u00a0Silicon<\/strong>: the SMC is integrated; shut down for 30\u00a0seconds or simply restart.<\/li>\n<\/ul>\n\n\n\n

            18 Clean reinstall<\/h3>\n\n\n\n

            If previous steps fail:<\/p>\n\n\n\n

              \n
            • In Recovery select\u00a0Reinstall macOS<\/strong>\u00a0(keeps data).<\/li>\n\n\n\n
            • Or choose\u00a0Erase\u00a0All\u00a0Content and Settings<\/strong>\u00a0(System Settings\u00a0> General\u00a0> Transfer or Reset).<\/li>\n<\/ul>\n\n\n\n

              19 Restore from backup<\/h3>\n\n\n\n

              Use Time Machine<\/strong> or an APFS clone to roll the entire system back to a working state.<\/p>\n\n\n\n

              20 Contact Apple Support<\/h3>\n\n\n\n

              If hardware tests fail or the anomaly persists, reach out to Apple Support or an Apple Authorised Service Provider (AASP).<\/p>\n\n\n\n

              \u00a9\u00a02025\u00a0Mac\u00a0Peer \u2013 Revision by MAC PEER<\/p>\n","protected":false},"excerpt":{"rendered":"

              20 steps (updated May 2025) Updated edition of the historic \u201cMac OS X: Troubleshooting and Problem\u2011Solving Guide\u201d by Mac Peer. Heads\u2011up : Some<\/p>\n","protected":false},"author":2,"featured_media":27397,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-27401","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mac-and-digital-life"],"_links":{"self":[{"href":"https:\/\/www.tuttologia.com\/mac-blog\/wp-json\/wp\/v2\/posts\/27401","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tuttologia.com\/mac-blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tuttologia.com\/mac-blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tuttologia.com\/mac-blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tuttologia.com\/mac-blog\/wp-json\/wp\/v2\/comments?post=27401"}],"version-history":[{"count":0,"href":"https:\/\/www.tuttologia.com\/mac-blog\/wp-json\/wp\/v2\/posts\/27401\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.tuttologia.com\/mac-blog\/wp-json\/wp\/v2\/media\/27397"}],"wp:attachment":[{"href":"https:\/\/www.tuttologia.com\/mac-blog\/wp-json\/wp\/v2\/media?parent=27401"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tuttologia.com\/mac-blog\/wp-json\/wp\/v2\/categories?post=27401"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tuttologia.com\/mac-blog\/wp-json\/wp\/v2\/tags?post=27401"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}