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TurboTax 2020 conundrum re Mac High Sierra O/S

I've been informed by the folks at Intuit that I will NOT be able to do my 2020 taxes on my iMac using TurboTax unless I upgrade my O/S to Mojave or Catalina. My (perfectly functioning) 2012 iMac 27" is NOT UPGRADABLE beyond High Sierra, which I presently use. So... while I'm entirely ready, willing and able to purchase a new (2020) iMac with the Catalina O/S, I would VERY much prefer waiting a bit for the upcoming Apple Silicon line, with its new Apple chip and probably a larger than 27" display. It may be only a few months down the road, but I will likely miss the tax filing deadline if I want to use TurboTax-- which I have been comfortably using for many years and do not want to switch to some other program. It is a dilemma! Unless Intuit makes it possible to use High Sierra for its 2020 TurboTax version (which seems doubtful, I'm told at this time,) or the new Apple Silicon becomes available before the end of 2020 or very early 2021. Your thoughts, advice and guidance would be very much appreciated! Thank you.

Posted on Sep 16, 2020 12:19 PM

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47 replies

Mar 10, 2021 4:46 PM in response to tbirdvet

Yes, TurboTax told me last year that I would have to upgrade to Mojave to use it this year. I just spent hours upgrading to Mojave, and TurboTax now tells me that I will have to upgrade to Catalina to use it next year. If I upgrade to Catalina, I will likely have problems using my old Dell color laser printer, which is 32-bit. I’m getting tired of TurboTax always wanting me to upgrade my operating system.


I have a Windows computer that I bought solely to run Quicken, as Quicken Essentials could no longer run on my Mac when I upgraded to High Sierra three years ago. I guess I will have to use it for TurboTax after this year. I used TurboTax for Windows for years before I bought my Mac, and TurboTax never made me upgrade Windows.

Mar 10, 2021 6:36 PM in response to Barry Sommers

I am in the situation! I have iMac OS High Sierra Version 10.13 ( 2018 ) was purchased and I can’t do my taxes . I got my TurboTax Home & Business at Costco for a total of 85.29 and it couldn’t be installed . It has to be Mojave 10.14 or higher. I end up paying to TurboTax 177 . 00 for the online version and let me tell you something that you have get individually, no any family member or friend can use it ! Getting a new computer is not the solution !

Mar 17, 2021 3:46 PM in response to Barry Sommers

Well, just an fyi, my computer did an update to MacOS Big Sur last week, and my 2019 and 2020 Turbotax don't load any longer. Big, big problem to finish with what I was doing since I do taxes for family and friends. I sat on the phone for about an hour plus with someone from Apple and she couldn't help me other than to tell me to create a "new user" on my computer. I then, for some reason, was able to load the 2020 from there, but had to start from scratch with the tax return I was working on. I know there's a way to share "files" from user to user on a computer, but for the life of me, I just can't figure out how to get all the files from the taxes I already did, over to my "new user" area. I've tried to google, youtube, etc. with no luck. I think I need to take a class but someone is responsible for this!!!! (Meaning Apple or Turbotax) Just wondering if I buy a new Turbotax program, and try to load it in the user area I'm already using (not the new one) if it would work then and open the taxes I was working on??

Mar 17, 2021 6:28 PM in response to LauraD1954

Wow! I don’t have an answer for your conundrum. It seems that the Apple software writers don’t consider TurboTax, Quicken, and Intuit when they write their upgrades. Vice-versa also applies.


Three years ago, after upgrading to High Sierra, I could no longer open my Quicken Essentials program. I had backed up my data but couldn’t open the program. The people at the local Apple store were useless, even though I had purchased Quicken Essentials from them three years earlier. I tried upgrading Quicken, to no avail. I ended up having to back up my hard drive and then reformat it with plain old Sierra. Then I could install Quicken Essentials again.


By then, I had decided to buy a Windows computer so that I could run Quicken. Getting my data from the Mac to a Windows-based Quicken was difficult and time-consuming. I finally got it there, and I mainly use that computer for Quicken. I have used Quicken since 1994. It looks like, in the future, I’ll also have to use that computer for TurboTax.

TurboTax 2020 conundrum re Mac High Sierra O/S

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