This thread and mainly the post of Mikecwest brought me on the right track to solve a problem. For future reference to others:
Formatting the TomTom on a mac brought the problem that the internal memory was not recognized any more by the TomTom device. Also the TomTom Home software did not recognize my device any more.
I spent an awful lot of time with trying formatting the TomTom internal drive to FAT32 via my mac. In theory it's simple: use the built in software Disk Utility on your mac, choose MS-DOS (FAT), put on a version of NavCore and you're good to go. However, it didn't work. The TomTom constantly showed the blue SD with a red cross on the screen and wouldn't startup...
What worked for me to get the internal memory running again:
TomTom internal memory not only needs a FAT32 format, but also a MBR (Master Boot Record) format. Disk Utility does not give you this function in OS High Sierra... but it's accessible and doable via Terminal. Found the info I needed here: https://apple.stackexchange.com/questions/226016/how-to-remove-partition-on-sd-card-using-a-mac
I used the following:
$ diskutil eraseDisk FAT32 TOMTOM MBRFormat disk4
Make sure you replace 'disk4' by the right disknumber. You can get an overview by using:
$ diskutil list. (The disknumber can be found as well via mac's Disk Utility. If you select the TOMTOM disk there, click the info button or use right click.)
I installed NavCore and the TomTom is up and running again. TomTom home recognizes the device again!
Formatting the TomTom on a mac brought the problem that the internal memory was not recognized any more by the TomTom device. Also the TomTom Home software did not recognize my device any more.
I spent an awful lot of time with trying formatting the TomTom internal drive to FAT32 via my mac. In theory it's simple: use the built in software Disk Utility on your mac, choose MS-DOS (FAT), put on a version of NavCore and you're good to go. However, it didn't work. The TomTom constantly showed the blue SD with a red cross on the screen and wouldn't startup...
What worked for me to get the internal memory running again:
TomTom internal memory not only needs a FAT32 format, but also a MBR (Master Boot Record) format. Disk Utility does not give you this function in OS High Sierra... but it's accessible and doable via Terminal. Found the info I needed here: https://apple.stackexchange.com/questions/226016/how-to-remove-partition-on-sd-card-using-a-mac
I used the following:
$ diskutil eraseDisk FAT32 TOMTOM MBRFormat disk4
Make sure you replace 'disk4' by the right disknumber. You can get an overview by using:
$ diskutil list. (The disknumber can be found as well via mac's Disk Utility. If you select the TOMTOM disk there, click the info button or use right click.)
I installed NavCore and the TomTom is up and running again. TomTom home recognizes the device again!
