Kudos for looking into this, and modernizing. You'll likely wonder why you waited so long, after you have been doing it for a week or so. With most POS systems, the prices for Mats, Mouldings, and Fabrics are updated weekly and automatically (using your specified markup rules), you can run reports of new and recently discontinued products so you don't sell something that is gone and can take the samples down, it's much faster to price something out on the screen instead of writing - and the math is all done for you, it's easier when comparing multiple choices because the math is all instant, it can print production logs and pick lists of materials needed, it will automatically build a customer/mailing list and order history that you can review at any time, Invoices for customer only contain basic info - while the framing details and part #s only go on the framers copy, and its easier to train someone to use. There are many other advantages, but those are a few. The costs are minimal for ANY of them, IMO.
Here is a handy comparison list that may be useful:
https://www.getthepictureframing.com/gfaq/software.htm
I believe FrameReady is the only one that natively will run locally ON a mac, on top of a database called Filemaker Pro.
Lifesaver Cloud and I-framer will also run on MAC, PC, IPAD/TABLET, etc because they are cloud based products. Cloud products are web based, so one can sign in from any location - as long as there is web access. (a production facility could log in, for example, to print workorders or update the status of orders)
My advice and the list are neutral, but note that we do use Lifesaver Cloud in our frame shop and I have consulted for them in the past and attend trade shows as a customer testimonial in their booth (but I am not an employee of Lifesaver) That said, our shop (Get The Picture) switched from the PC based version of Lifesaver to the cloud version of Lifesaver just 2 weeks ago. All of our old data was converted, and the transition was surprisingly seamless. We can write up orders on our desktop computers or tablets, and the credit card terminals were provided free (EVO Dejavoo Z11 terminals, which have touch screens for signature and include a built in receipt printer) When you enter an order, the details are transmitted wirelessly to the credit card terminal. In other words, there is no double entry of numbers, and the approval is transmitted back to the POS screen. All of that happens in about 1-2 seconds, and doesn't require a dedicated phone line (it uses an encrypted internet connection). Any POS that uses integrated terminals likely works in a similar way.
My suggestion is to pick out a few, request demos from the vendors, and try each of them out in your shop to see which one fits your style and needs. Test out tech support for each company as well, to see how responsive and helpful they are. Print workorders for each, to understand how the math is laid out to do the jobs. Ask questions
With all that, you'll be in a good place to pick the one that works best for YOU.
There will likely be show specials/promos/discounts at the WCAF show in 2 weeks, and at Framecon in June.
Good luck!
Mike