![]() 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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