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I seem to have gotten to the point where I should update Safari, to which some websites are complaining ("You are using an out-of-date browser. . .") and others unexpectedly stalling or just crashing. So I either switch to a different browser (e.g. Firefox, which updates every other day), or I update my iMac's OS, now High Sierra (10.13.6). But I hesitate to do that, as it may well break old applications.
I'm thinking of downloading the next OS, Mojave (?), to an unused USB drive, and then booting from it to test all my applications. Is this feasible? Will the Apple Store allow it? Will this provide a valid test? Is this what's called a 'sandbox'?
You can see that not only is Safari out-of-date, but I am as well.
/Mr Lynn
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I’ve done that exact thing before. Not sure what the best OS download link currently is, but I’ll check. One possible blip is the AFPS drive conversion thing.
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MrLynn,
Easiest way to do this is to clone your existing configuation to the USB drive. Boto off the USB drive. Upgrade it to Mojave. Make it the boot drive and use it for a bit. I found minimal problems moving from High Sierra to Mojave. If you're concerned about losing the ability to use older apps, you're likely to have that happen if you go from High Sierra to, say, Catalina (which doesn't support 32-bit apps). High Sierra to Mojave? Likely minimal problems.
Robert
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Anything that is 64 bit will run on Mojave. If it is 32 bit it won't. So just look at the application list, sort it by bit and you will see what works and what doesn't for the most part.
About this mac - system report - software - applications- sort by Kind.
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Ombligo,
Both 32-bit and 64-bit apps run under Mojave. Catalina and newer? No 32-bit apps. The fact that Catalina and newer can't run 32-bit apps is one of the reasons my office system runs under Mojave. I've made the switch to Monterey at home, though. I virtualized a scaled down version of a Mojave setup for 32-bit apps, which I run in Parallels under Monterey.
Robert
