![]() ![]() Click on the year and use the down arrow to the right of it to change the year to 2012.If your Mac is set to Set date and time automatically, which is usually the case, disable it.Using trial and error, I found that setting a date in 2012 will let the installer function. The installer’s certificate has expired, so you need to set your Mac to think it’s operating in the past. You can’t just install Lion on any old Mac that support it. See Apple and the ‘goto fail’ Bug for information on securing Lion. Lion is the oldest version of OS X impacted by the “goto fail” bug. Lion is no longer available for purchase through normal App Store channels, although you may be able to acquire access to it through Apple Support. Lion was replaced by OS X 10.8 Mountain Lion on July 25, 2012, just a year after Lion first became available. It was the first version of Mac OS X to be part of the annual upgrade program – ever since Lion, Apple has released a new macOS version every year. The last version of Lion, OS X 10.7.5, was released on October 4, 2012. Apple introduced Rosetta, which lets Intel CPUs run PowerPC apps, with OS X 10.4 Tiger for the first Intel Macs in 2006, and it had been part of OS X until now. It requires Core 2 Duo or newer, which leaves the following Macs behind unless you update the firmware and install a Core 2 Duo CPU:Īdditionally, Lion is the first version of OS X with no support for PowerPC software. ![]() First of all, Lion is a 64-bit operating system, so it won’t work on those 2006 Macs built around 32-bit Core Solo and Core Duo processors. Like OS X 10.6 Snow Leopard, Lion requires an Intel-based Mac, but it goes two steps beyond that. As a convenience, Apple allowed users to bring their Macs to a nearby Apple Store and use Apple’s WiFi to make the download. You must have OS X 10.6 Snow Leopard installed to purchase, download, or install Lion, and the 4 GB download could take some time with slower DSL connections (we don’t even want to think about how long it would take with dial-up). ![]() Lion was only available by purchase and download from the Mac App Store, where it retailed for US$29.99. Some of these changes were to make it easier for iPhone, iPad, and iPod touch users to adapt to the Mac, some to make the two platforms work better together, and some to keep making the Mac better and better. Again, that works like a charm.OS X 10.7 Lion was released on Jand made some huge changes to the Mac. Now when I do my weekly disk cleanup/maintenance/repairs, after first running Onyx, I re-boot each Mac from their respective High Sierra backup, and run Tech Tool Pro from there to have it do its "magic" on each internal SSD. So, prior to upgrading to Mohave for each of my Macs)via a clean, fresh, "virgin" installation), I first upgraded Tech Tool Pro to the newest version on each "High Sierra" Mac, then used SuperDuper! to backup each Mac to that Samsung 860 EVO 500 gig SSD, re-started each Mac from their respective "High Sierra" backup, used Disk Utility there to Erase and Format each internal SSD on each Mac, did a fresh, clean, "virgin" installation of OS 10.14.2, and finally "migrated"/copied needed "stuff" from the backup. Micromat has a version of Tech Tool Pro (I rely on it, along with Onyx) that is "mostly" compatible with Mojave. I am actually doing the same thing now, although "backwards". I used it for testing all my applications for each machine, and it was very helpful. I have a Samsung 500 gig 860 EVO SSD, and had two "Mojave" partitions on it for each of my Macs. Yeah, I actually did that (via SuperDuper!) when I was testing Mojave. Fortunately, I always keep a copy of the latest full Mac OS Installation file, and I even still have the ones for Sierra and High Sierra. Shoot, I just looked at my Purchased Items in the App Store, and now ALL my prior "purchases" of various versions of the Mac OS are gone! Was not that way when I was previously running Sierra or High Sierra. Apple has recently been somewhat "anal" regarding the availability of either of them. Not sure if you can download either Sierra (OS 10.12.6) or High Sierra (OS 10.13.6). You would be taking quite a jump from OS 10.7.5 to OS 10.14.2. The other thing you'll need to do is to insure that any third party (ie, non-Apple) software you are running is compatible with Mojave. Again, this would be downloading the full Mojave OS 10.14.2 file/installer. Your machine can run Mojave, and I would think you could download it from the App Store. But for that, you'll need a backup on an external device. The other way is to do a clean installation of the newer Mac OS.
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