How to install arm64 binaries for TeX Live on Windows First, an OS of a device should be arm64 Windows. All binaries given here are not tested. In the following, $INSTALLDIR is $SELFAUTOPARENT in the TeX Live, that is, the parent directory of "texmf-dist". Actually the directory $INSTALLDIR is shown by a command: kpsewhich --var-value=SELFAUTOPARENT (1) Expand the file tl-arm64-windows.zip in $INSTALLDIR. In the case of update, remove all files in $INSTALLDIR/bin/arm64-windows before expanding tl-arm64-windows.zip, because it is possible that some files are deleted in a new tl-arm64-windows.zip. (2) After expanding tl-arm64-windows.zip in $INSTALLDIR, change related command PATH from $INSTALLDIR\bin\win32 to $INSTALLDIR\bin\arm64-windows;$INSTALLDIR\bin\win32 Note that a few files are absent in arm64 binaries. Thus $INSTALLDIR\bin\win32 is necessary "after" $INSTALLDIR\bin\arm64-windows. The x86 binaries are assumed to be usable by emulation. The arm64 binaries are not tested. If they are not usable, it is easy to recover the original TeX Live win32, by changing back the PATH: $INSTALLDIR\bin\arm64-windows;$INSTALLDIR\bin\win32 ---> $INSTALLDIR\bin\win32 (3) gsftopk.exe and dvisvgm.exe require arm64 Ghostscript DLL, which will be difficult to obtain. Here a candidate, gs9533arm64full-gpl.exe, is given. It is the Ghostscript 9.53.3 cross-compiled by Visual Studio 2019. The installer itself is an x86 executable file. It is not tested. dvisvgm finds ghostscript DLL by reading a registry, but gsftopk finds the DLL from the PATH variable. The installer gs9533arm64full-gpl.exe does not change the PATH variable, so users should change the PATH to include the location of gsdll64.dll. In various cases x86 Ghostscript, which is preinstalled in the TeX Live for Windows, is also used. (4) Some binaries in tl-arm64-windows.zip may be newer than those in the present TeX Live. Thus probably it is necessary to recreate format files by fmtutil-sys --all --no-error-if-no-engine=luajittex,luajithbtex Note that luajittex and luajithbtex are not supported in arm64 on Windows. -- Akira Kakuto