{"id":142,"date":"2014-09-02T09:52:46","date_gmt":"2014-09-02T13:52:46","guid":{"rendered":"http:\/\/www.yourmacexpert.com\/blog\/?p=142"},"modified":"2014-09-02T19:08:45","modified_gmt":"2014-09-02T23:08:45","slug":"os-x-10-10-yosemite-and-some-history-about-changing-system-requirements","status":"publish","type":"post","link":"http:\/\/www.yourmacexpert.com\/blog\/2014\/09\/02\/os-x-10-10-yosemite-and-some-history-about-changing-system-requirements\/","title":{"rendered":"OS X 10.10 Yosemite, and some history about changing system requirements"},"content":{"rendered":"<p>For many years each new release of OS X would exclude some models that could run the previous release. Mac users see this as the cost of progress\u2014new features sometimes require new or more powerful hardware.<\/p>\n<p>But that seems to have changed. When Apple announced OS X 10.10\u00a0Yosemite, they also announced that it had the same system requirements as 10.9 Mavericks, which in turn had the same requirements as 10.8 Mountain Lion. That&#8217;s three generations of OS X that have used the same system requirements, and quite a change from previous OS X releases.<\/p>\n<p><strong>Consider the Previous History:<\/strong><\/p>\n<ul>\n<li>OS X\u00a0<strong>10.3 Panther was <em>not<\/em><\/strong><em>\u00a0<strong>supported<\/strong><\/em> on all Macs that ran Jaguar, excluding those that didn&#8217;t have built-in USB (like the beige PowerMac G3 models, and the first 3 PowerBook G3 models).<\/li>\n<li>OS X\u00a0<strong>10.4 Tiger<\/strong>\u00a0<strong>was\u00a0<em>not<\/em><\/strong><em>\u00a0<strong>supported<\/strong><\/em> on all Macs that ran Panther, excluding models that didn&#8217;t have built-in FireWire (like the first 5 iMac models).<\/li>\n<li>OS X\u00a0<strong>10.5 Leopard<\/strong>\u00a0<strong>was\u00a0<em>not<\/em><\/strong><em>\u00a0<strong>supported<\/strong><\/em> on all Macs that ran Tiger, excluding all G3 Macs and G4 Macs with CPUs slower than 867MHz.<\/li>\n<li>OS X\u00a0<strong>10.6 Snow Leopard<\/strong>\u00a0<strong>was\u00a0<em>not<\/em><\/strong><em>\u00a0<strong>supported<\/strong><\/em> on all Macs that ran Leopard. All the PowerPC Macs were excluded.<\/li>\n<li>OS X <strong>10.7 Lion<\/strong>\u00a0<strong>was\u00a0<em>not<\/em><\/strong><em>\u00a0<strong>supported<\/strong><\/em> on all Macs that ran Snow Leopard. The earliest Intel models were left out.<\/li>\n<\/ul>\n<p>The last time Apple went released three major\u00a0OS X upgrades without\u00a0changing\u00a0system requirements was back when OS X was new. OS X 10.0, 10.1, and 10.2 all had the same system requirements.<\/p>\n<p>If you&#8217;re curious about which Mac models had the largest number of supported OSs, that seems to be a 4-way tie between the 20-inch and 24-inch 2007 iMacs, and the 15-inch and 17-inch MacBook Pros. All four\u00a0shipped with 10.4.10, and can be upgraded to:<\/p>\n<ul>\n<li>OS X 10.5 Leopard,<\/li>\n<li>OS X 10.6 Snow Leopard,<\/li>\n<li>OS X 10.7 Lion,<\/li>\n<li>OS X 10.8 Mountain Lion,<\/li>\n<li>OS X 10.9 Mavericks, and<\/li>\n<li>OS X 10.10 Yosemite.<\/li>\n<\/ul>\n<p>(The Mac 512Ke was released with System Software 0.7 (really!) and ran all subsequent releases up to and including System 6.0.8. But OS releases numbers were obviously a bit odd back then \u2014 there wasn&#8217;t ever a System 3 or System 4 \u2014 so I&#8217;m not sure how to count them.)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>For many years each new release of OS X would exclude some models that could run the previous release. Mac users see this as the cost of progress\u2014new features sometimes require new or more powerful hardware. But that seems to &hellip; <a href=\"http:\/\/www.yourmacexpert.com\/blog\/2014\/09\/02\/os-x-10-10-yosemite-and-some-history-about-changing-system-requirements\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[1],"tags":[],"class_list":["post-142","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p2JgYQ-2i","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"_links":{"self":[{"href":"http:\/\/www.yourmacexpert.com\/blog\/wp-json\/wp\/v2\/posts\/142","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.yourmacexpert.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.yourmacexpert.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.yourmacexpert.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.yourmacexpert.com\/blog\/wp-json\/wp\/v2\/comments?post=142"}],"version-history":[{"count":2,"href":"http:\/\/www.yourmacexpert.com\/blog\/wp-json\/wp\/v2\/posts\/142\/revisions"}],"predecessor-version":[{"id":144,"href":"http:\/\/www.yourmacexpert.com\/blog\/wp-json\/wp\/v2\/posts\/142\/revisions\/144"}],"wp:attachment":[{"href":"http:\/\/www.yourmacexpert.com\/blog\/wp-json\/wp\/v2\/media?parent=142"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yourmacexpert.com\/blog\/wp-json\/wp\/v2\/categories?post=142"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yourmacexpert.com\/blog\/wp-json\/wp\/v2\/tags?post=142"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}