evamac,
Your iMac is newer than mine. Mine is an iMac (Retina 5K, 27-inch, late 2014) Turbotax 2023 will not run on macOS BigSur 11.7.10 and I can't update past BigSur. I was able to run Turbotax 2022 Premier last year.
I have a MacBook Pro that is running Ventura and it should run Turbotax 2023. I'm waiting to receive all my 1099s before I install it.
Glad to see that you are able to run Turbotax 2023 on an external disk drive. I'd run Disk Utility and see if it can repair your internal drive. Looks like you are running fine by booting to your external hard drive. I suggest you keep Time Machine backups current.
My iMac is ten years old and is still running very well. I've had some good Apple Support, even after Apple Care ran out. I really like the 27" monitor. I'll probably have to replace this computer in the near future, but today it is running "like a top". Love the 27" 5K screen and I'm also running two 24" monitors.
I am still wondering why Turbotax 2023 can't run on it. It must require something not found in BigSur. Most other software still works on my iMac.
veehbj
