{"id":96473,"date":"2024-09-16T12:52:04","date_gmt":"2024-09-16T17:52:04","guid":{"rendered":"https:\/\/eshop.macsales.com\/blog\/?p=96473"},"modified":"2025-04-11T10:08:59","modified_gmt":"2025-04-11T15:08:59","slug":"macos-15-sequoia-2019-mac-pro","status":"publish","type":"post","link":"https:\/\/eshop.macsales.com\/blog\/96473-macos-15-sequoia-2019-mac-pro\/","title":{"rendered":"Have a 2019 Mac Pro? Here&#8217;s Our Advice on Whether or Not to Upgrade to macOS 15 Sequoia"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1080\" src=\"https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/09\/2019-Mac-pro-sequoia-upgrade.png\" alt=\"\" class=\"wp-image-96515\" srcset=\"https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/09\/2019-Mac-pro-sequoia-upgrade.png 1920w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/09\/2019-Mac-pro-sequoia-upgrade-213x120.png 213w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/09\/2019-Mac-pro-sequoia-upgrade-284x160.png 284w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/09\/2019-Mac-pro-sequoia-upgrade-190x107.png 190w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/09\/2019-Mac-pro-sequoia-upgrade-1536x864.png 1536w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/09\/2019-Mac-pro-sequoia-upgrade-1400x787.png 1400w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/09\/2019-Mac-pro-sequoia-upgrade-750x421.png 750w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/09\/2019-Mac-pro-sequoia-upgrade-548x308.png 548w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/09\/2019-Mac-pro-sequoia-upgrade-364x204.png 364w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/09\/2019-Mac-pro-sequoia-upgrade-230x129.png 230w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/09\/2019-Mac-pro-sequoia-upgrade-100x56.png 100w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/09\/2019-Mac-pro-sequoia-upgrade-213x120@2x.png 426w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/09\/2019-Mac-pro-sequoia-upgrade-284x160@2x.png 568w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/09\/2019-Mac-pro-sequoia-upgrade-190x107@2x.png 380w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>UPDATE: macOS 15.2<\/strong><\/h3>\n\n\n\n<p>With the release of macOS 15.2, there is good news for users with 2019 Mac Pros. \u00a0<\/p>\n\n\n\n<p>Apple fixed the problem which causes kernel panics when Thunderbolt 3 enclosures are connected to 2019 Mac Pros running macOS 15. \u00a0Our team spent days testing the beta releases of macOS 15.2 and are confident that this new release of macOS 15 completely fixes this issue. \u00a0If you are using a Thunderbolt 3 enclosure with SATA drives on your 2019 Mac Pro, it is now safe to upgrade to macOS 15.<\/p>\n\n\n\n<p>When you upgrade to macOS 15.2, I suggested you complete the upgrade while the enclosure is disconnected from your Mac and then reconnect it once the upgrade has completed. \u00a0This will ensure that your Mac will run correctly during the upgrade process.<\/p>\n\n\n\n<p><strong>Warning for users with Thunderbolt 2 enclosures<\/strong><\/p>\n\n\n\n<p>Unfortunately, while testing beta releases of macOS 15.2, we discovered a new kernel panic bug. \u00a0If you are upgrade to macOS 15.2 on your 2019 Mac Pro and have a Thunderbolt 2 enclosure connected (with an Apple Thunderbolt 2 to 3 adapter), you will most likely see a kernel panic. \u00a0This bug is new in macOS 15.2, Thunderbolt 2 enclosures work just fine with macOS 15.0 or 15.1. \u00a0If you are using a Thunderbolt 2 enclosure, you should hold off upgrading to macOS 15 until Apple fixes this problem. \u00a0If you are already running macOS 15.0 or 15.1, DO NOT upgrade to macOS 15.2.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p><em>Original Post<\/em><\/p>\n\n\n\n<p>As Apple<a rel=\"noreferrer noopener\" href=\"https:\/\/www.apple.com\/newsroom\/2024\/09\/macos-sequoia-is-available-today\/\" target=\"_blank\"> rolls out macOS 15 Sequoia today<\/a>, there\u2019s a lot to be excited about. After months of rigorous testing across four separate OWC storage test labs, <a rel=\"noreferrer noopener\" href=\"https:\/\/eshop.macsales.com\/blog\/93446-macos-sequoias-awesome-new-iphone-mirroring-lets-you-use-your-iphone-even-if-your-iphone-is-in-another-room\/\" target=\"_blank\">in addition to all the new features<\/a>, we\u2019re impressed by the significant improvements in this version related to storage. Apple has enhanced the overall reliability of storage hardware and the file system while dramatically reducing occurrences of kernel panics. For most users, <a rel=\"noreferrer noopener\" href=\"https:\/\/eshop.macsales.com\/blog\/96475-upgrade-macos-15-sequoia-softraid-8-3\/\" target=\"_blank\">macOS 15 Sequoia offers a smoother, more dependable experience <\/a>than the previous version, Sonoma.\u00a0<\/p>\n\n\n\n<p>However, if you&#8217;re a 2019 Mac Pro user, there are some specific situations to be aware of. While the new OS offers many advancements, there are still some edge cases that may require holding off on the update or preparing for further patches. Let\u2019s dive into what\u2019s changed and what 2019 Mac Pro users need to know.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-overall-improvements-in-macos-sequoia\"><strong>Overall improvements in macOS <\/strong>Sequoia<\/h2>\n\n\n\n<p>macOS Sequoia introduces several critical updates that boost system stability and performance, particularly for those handling large amounts of data or using advanced storage configurations. Key improvements include:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Enhanced Storage Reliability: Apple&#8217;s tweaks have made the OS much better at managing storage hardware, reducing data management errors.&nbsp;<\/li><\/ul>\n\n\n\n<ul class=\"wp-block-list\"><li>Fewer Kernel Panics: Users will experience fewer unexpected crashes, thanks to better handling of storage and file system processes.&nbsp;<\/li><\/ul>\n\n\n\n<ul class=\"wp-block-list\"><li>Better File System Support: Apple has optimized file system operations, reducing instances where file access or data transfers cause system issues.&nbsp;<\/li><\/ul>\n\n\n\n<p>For most users, this means a significant step up in performance and stability, especially for those managing large files, creative projects, or complex workflows.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Great news for 2019 Mac Pro Users with OWC Accelsior 4M2s and 8M2s<\/strong>&nbsp;<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1534\" height=\"897\" src=\"https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2023\/08\/owc-accelsior-8m2-hero-left.png\" alt=\"\" class=\"wp-image-86391\" srcset=\"https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2023\/08\/owc-accelsior-8m2-hero-left.png 1534w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2023\/08\/owc-accelsior-8m2-hero-left-205x120.png 205w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2023\/08\/owc-accelsior-8m2-hero-left-284x166.png 284w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2023\/08\/owc-accelsior-8m2-hero-left-190x111.png 190w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2023\/08\/owc-accelsior-8m2-hero-left-205x120@2x.png 410w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2023\/08\/owc-accelsior-8m2-hero-left-284x166@2x.png 568w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2023\/08\/owc-accelsior-8m2-hero-left-190x111@2x.png 380w\" sizes=\"auto, (max-width: 1534px) 100vw, 1534px\" \/><figcaption>OWC\u2019s blazing fast Accelsior 8M2.<\/figcaption><\/figure>\n\n\n\n<p>If you are using macOS 14 on a 2019 Mac Pro with a PCI card with blades, you have probably started up your Mac at some point and had the volumes on the blades not appear. It&#8217;s not just the volumes that do not appear\u2014the blades don&#8217;t either. System Report shows that the PCI card is installed, but according to macOS, the card contains no NVMe blades. The blades do not show up in Apple&#8217;s Disk Utility application or in SoftRAID. This &#8220;feature&#8221; was introduced with a new NVMe driver as part of last year\u2019s macOS Sonoma.&nbsp;<\/p>\n\n\n\n<p>This bug only affects Macs running macOS 14 and can occur with OWC <a rel=\"noreferrer noopener\" href=\"https:\/\/eshop.macsales.com\/item\/OWC\/SSDACL4M20GB\/\" target=\"_blank\">Accelsior 4M2<\/a> and <a rel=\"noreferrer noopener\" href=\"https:\/\/eshop.macsales.com\/item\/OWC\/SSDACL8M208T\/\" target=\"_blank\">8M2 cards<\/a> as well as other cards like Sonnet 4&#215;4 and 8&#215;4 Silent cards. It occurs with any brand NVMe blade installed on the PCI card. Some users were able to work around it by booting first into Safe Mode and then booting immediately back into normal mode, while others have had to revert to macOS 13 (Ventura) before their blades would finally become available.&nbsp;<\/p>\n\n\n\n<p>The <strong>great<\/strong> news is that this bug is now completely fixed in macOS Sequoia. Upon updating your Mac Pro to Sequoia, your blades should now always appear. No more booting into Safe Mode, no more rebooting countless times hoping your blades would show up. It (now) just works!&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>A warning for 2019 Mac Pro Users with Thunderbolt SATA enclosures<\/strong>&nbsp;<\/h2>\n\n\n\n<p>While many storage issues have been resolved in macOS Sequoia, 2019 Mac Pro users with external Thunderbolt SATA enclosures like the OWC <a href=\"https:\/\/eshop.macsales.com\/item\/OWC\/TB3IVKIT000\/\" target=\"_blank\" rel=\"noreferrer noopener\">ThunderBay 4 <\/a>or <a href=\"https:\/\/eshop.macsales.com\/shop\/thunderbay-8\/thunderbolt-3\" target=\"_blank\" rel=\"noreferrer noopener\">ThunderBay 8 <\/a>may run into a different problem. <\/p>\n\n\n\n<p>During our extensive testing, we discovered that when running macOS Sequoia and accessing four or more SATA HDDs or SSDs simultaneously, the Mac can experience a system hang, leading to a kernel panic, automatic restart, and loss of all work which hasn\u2019t been saved.&nbsp;&nbsp;<\/p>\n\n\n\n<p>This issue seems to occur more frequently with faster, higher-capacity HDDs and SATA SSDs, and when multiple disks are being accessed at once\u2014especially in RAID configurations. These kernel panics are particularly disruptive, as they lead to lost work and unexpected restarts.&nbsp;If this type of enclosure is core to your workflow, it\u2019s advisable that you hold off on upgrading to Sequoia for the time being.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What\u2019s next?<\/strong>&nbsp;<\/h2>\n\n\n\n<p>We have thoroughly investigated this issue with Thunderbolt SATA enclosures and <em>know<\/em> that it is a problem with the new SATA driver in macOS Sequoia. These hangs continue to occur, even if we prevent SoftRAID from loading.. In addition, when a hang occurs, the activity lights get stuck on for one or more drives, a clear indication that something has gone wrong with the SATA driver.&nbsp;<\/p>\n\n\n\n<p>We have been able to reproduce this 100% of the time with certain makes and models of HDDs and SSDs by initializing four or more disks with SoftRAID, creating or deleting a volume, or converting between AppleRAID and SoftRAID volumes. If four or more disks are used, the hang and subsequent restart will occur.&nbsp;<\/p>\n\n\n\n<p>We have reported this problem to Apple and are looking forward to a prompt resolution. Until then, we recommend that users with 2019 Mac Pros and Thunderbolt SATA enclosures exercise caution when running macOS 15, especially if they rely on accessing multiple high-speed SATA drives simultaneously. <\/p>\n\n\n\n<p>It\u2019s important to note that this problem does not affect <strong>USB3 <\/strong>enclosures like the <a href=\"https:\/\/eshop.macsales.com\/shop\/owc-mercury-elite-pro-quad\/raid-5?srsltid=AfmBOophBfi0MzHOcpvOwb1CLLDR2-pUL_4B5qEvyB6O1Q0stZNHbfeA\" target=\"_blank\" rel=\"noreferrer noopener\">OWC Mercury Elite Pro Quad.<\/a>&nbsp;<\/p>\n\n\n\n<p>We will update this post as soon as Apple releases a new version of macOS Sequoia that addresses the issue. You can also sign up for the SoftRAID Critical Issues email to be kept aware of SoftRAID updates, features, and more. &nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Conclusion<\/strong>&nbsp;<\/h2>\n\n\n\n<p>macOS Sequoia brings numerous enhancements that will benefit most users, especially those running storage-heavy workflows. However, if you\u2019re using a 2019 Mac Pro, be aware of the resolved NVMe blade bug and the ongoing SATA driver issue. For most, the upgrade is smooth sailing, but for others, it might be worth waiting for the next release of macOS 15.&nbsp;<\/p>\n\n\n\n<p>Stay tuned for updates, and feel free to reach out if you have any questions about how macOS 15 impacts your specific setup!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Apple today has released its latest desktop operating system: macOS 15 Sequoia. If your workflow includes a 2019 Mac Pro, these are the storage related issues you need to know about.<\/p>\n","protected":false},"author":100,"featured_media":96515,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"spay_email":"","footnotes":""},"categories":[7597],"class_list":["post-96473","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mac-tips"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.2 (Yoast SEO v20.2) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Have a 2019 Mac Pro? Here&#039;s Our Advice on Whether or Not to Upgrade to macOS 15 Sequoia<\/title>\n<meta name=\"description\" content=\"Apple today has released its latest desktop operating system: macOS 15 Sequoia. 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